Crosslist from Mercari to Facebook Marketplace — Sell the Stock a Parcel Cannot Carry
Take your Mercari listings to Facebook Marketplace without retyping them. Titles, descriptions, photos, prices and categories transfer, and sold-detection keeps the two sides from selling the same item twice.
- Source: Mercari — a US shipping-first resale marketplace where, since 6 January 2025, the seller pays a flat 10% and the buyer pays a 3.6% protection fee.
- Destination: Facebook Marketplace — over a billion monthly visitors, local-first, and free to list.
- Why the pair works: Mercari’s economics assume a parcel. Marketplace’s assume a car. The stock that loses money in a box is exactly the stock Marketplace is good at.
- The 10% is on shipping too — Mercari’s fee is charged on the item price and the buyer-paid shipping combined, which is what quietly kills heavy, cheap items.
- What transfers: title, description, photos, price and category into a real Marketplace listing.
- Connection: neither channel has a self-serve seller API, so FLUF works through the browser extension inside your own signed-in sessions.
- Sync: Mercari supports order sync and sold-detection; Marketplace supports sold-detection. Relisting and offer management are not available on either, and this page does not claim them.
- Cost of FLUF: 7 days for £1, then plans from £9/month (Starter). There is no free plan.
On This Page
- Why Mercari sellers end up on Marketplace
- The fee maths, including the part on shipping
- Which items should go, and which should not
- How it works
- What transfers, field by field
- What syncs, and what does not
- Your Mercari copy is written for a stranger in another state
- Both channels report you, differently
- A note on doing this at scale
- Four things that catch Mercari sellers out
- Keeping both
- Pricing
- Sources & Verification
Why Mercari Sellers End Up On Marketplace
Mercari is a good marketplace for a specific shape of item: small, light, postable, worth enough to justify a label. It is national, so your audience is not limited by geography, and it is shipping-first, so the whole flow assumes a parcel is going in the post.
Every reseller eventually accumulates the other shape. A bookshelf. A car seat. Four boxes of textbooks. A dining chair that would cost more to ship than it sells for. On Mercari those items sit there, or they sell and you lose money on the label, and you learn not to list them.
Facebook Marketplace is built for exactly that. It is proximity-ranked, free to list, and the default transaction is a person driving to you. Meta says more than a billion people visit Marketplace every month, and in a November 2025 update it reported that one in four young-adult daily Facebook users in the US and Canada opens Marketplace daily, with more than 200 million fashion items listed in the US alone. Fashion is now its second-largest category, which matters because fashion is what most Mercari sellers have.
So this is not a migration. It is putting the same inventory in front of a second demand curve, where the items that Mercari’s economics punish are the ones Marketplace rewards.
The Fee Maths, Including The Part On Shipping
Mercari’s fee structure changed on 6 January 2025 and a great deal of advice written in 2024 is now wrong. The 2024 arrangement — zero seller fees, with the cost moved onto the buyer — was reversed. Mercari’s current help page states it plainly: a 10% selling fee is charged to the seller on the combined amount of item price and buyer-paid shipping, and buyers pay a flat 3.6% Buyer Protection fee on the same combined amount. Listing remains free.
There is no separate payment processing fee for listings created or updated on or after that date; older listings keep the previous structure until you touch them, which is a detail worth knowing if you have dormant stock.
The clause that decides which items belong where is the phrase “combined amount of item price and buyer-paid shipping”. A $20 item with $12 of shipping is a $32 base, and 10% of it is $3.20, not $2.00. The heavier and cheaper the item, the larger the share of your money that the shipping component of the fee consumes.
| Mercari | Facebook Marketplace | |
|---|---|---|
| Listing | Always free | Free |
| Seller fee | 10% of item price + buyer-paid shipping | None on a local pickup deal — Meta is not in the transaction |
| Buyer fee | 3.6% Buyer Protection on the same combined amount | None on a local deal |
| Payment processing | None separately, for listings from 6 Jan 2025 | Applies only where Checkout is used |
| Shipped orders | Prepaid label at discounted rates, or ship it yourself | Checkout selling fee set by Meta — read its own fee page |
| Reach | National | Local, ranked by proximity |
Marketplace’s own fee position deserves care rather than a confident number. A local handover arranged in Messenger costs nothing on either side, because there is no transaction for Meta to sit inside. A shipped order completed through Checkout carries a selling fee that Meta sets and has revised more than once; read it on Meta’s own page rather than trusting a figure quoted second-hand, this page included.
Which Items Should Go, And Which Should Not
Crosslisting everything is the wrong instinct here, and it is worth being specific because this pair is one of the few where the answer is not “send it all”.
Send: anything bulky, heavy or fragile. Furniture, exercise equipment, strollers and car seats, mirrors, lamps, instruments, bulk lots, anything where a shipping quote made you wince. Also anything that has sat on Mercari for months — a local buyer with a truck is a genuinely different buyer.
Keep on Mercari only: small high-value items where a national audience is the whole point. A rare pair of sneakers in your size range has maybe three plausible buyers within driving distance and several thousand across the country.
Send to both: ordinary clothing, homewares and electronics in the middle of the range. There is no downside as long as sold-detection is doing its job, which is the next section.
How It Works
- Connect Mercari. Mercari has no public seller API, and its session is bound to your browser. FLUF’s extension works inside your own signed-in session, so nothing is done that you could not do yourself with a lot more clicking.
- FLUF reads your listings. The walk is paced and bounded rather than unlimited — Mercari serves your own listings about twenty at a time, and FLUF caps a single scan rather than following the pagination forever.
- Connect Facebook Marketplace. Same principle for the same reason: Meta’s Marketplace listing APIs are restricted to eligible partners and there is nothing self-serve, so the extension acts inside your own Facebook session.
- Choose what goes. This is where the section above turns into a filter rather than a philosophy.
- Publish. The listing appears on Marketplace under your own account and FLUF records the id so the two can be kept in step.
What Transfers, Field By Field
| Mercari | Becomes on Marketplace | Notes |
|---|---|---|
| Title | Title | Carries over; Mercari titles are usually keyword-dense, which reads oddly locally |
| Description | Description | See the copy section below — most of it needs one read-through |
| Photos | Photos | Mercari allows up to 12 per listing; Marketplace needs at least one |
| Price | Price | USD on both, no conversion |
| Category | Marketplace category | Mapped by FLUF; general categories translate cleanly |
| Condition | Condition, where the category has one | Marketplace’s condition vocabulary is coarser than Mercari’s |
| Shipping weight and label choice | Nothing | Marketplace’s default is that the buyer comes to you |
| Location | Location | Irrelevant on Mercari, decisive on Marketplace — set it properly |
What Syncs, And What Does Not
| Behaviour | Mercari | Facebook Marketplace |
|---|---|---|
| Order sync into FLUF | Yes | No |
| Sold elsewhere, pull it down here | Yes | Yes |
| Automatic relisting | No | No |
| Offer management | No | No |
Sold-detection is the feature that makes running both safe. When an item sells on Mercari, FLUF takes the Marketplace listing down. Coming the other way needs a small manual act from you, and the reason is worth stating: most Marketplace sales never become an order record anywhere. Someone messages you, drives over, and hands you cash. There is nothing for a system to read. Mark it sold in FLUF and the Mercari listing comes down.
That single habit — mark it sold when the car pulls away — is what stops the failure mode this pair has, which is a buyer paying for something on Mercari that left your house on Saturday. Mercari’s fee structure means a cancellation costs you nothing in fees, but it costs you in seller metrics and in the twenty minutes of apologising.
Relisting and offer management are not supported on either channel through FLUF. Automation features are included in every plan rather than sold as add-ons; they work on the channels that support them, which for this pair means order sync on Mercari and sold-detection on both.
Your Mercari Copy Is Written For A Stranger In Another State
Mercari descriptions have a house style, and it is a shipping style. Measurements in inches because the buyer cannot hold it. “Smoke-free home” because the buyer cannot smell it. “Ships next business day” because that is the promise being made. Bundle offers, because bundling saves on postage.
None of that is wrong on Marketplace, but half of it is answering a question nobody is asking. A local buyer is going to look at the thing. What they want to know is where you are, when they can come, and whether it will fit in their car.
You do not need to rewrite hundreds of listings. Two edits carry most of the value: delete the shipping promises so you are not accidentally offering something you no longer mean, and add a dimension or a weight to anything a person has to lift. “Fits in a hatchback with the seats down” sells a bookcase faster than three paragraphs of condition detail.
Both Channels Report You, And They Report You Differently
A US reseller running two channels has one tax position and two sets of paperwork, and the shape of the paperwork differs because the platforms sit in different places relative to the money.
Mercari is in the middle of every sale. It takes the payment, holds it, deducts its 10%, and pays you out. That means Mercari knows exactly what you grossed, and the year-end documentation reflects a number it calculated rather than one you reported.
Marketplace, on a local cash handover, is nowhere near the money. Meta processed nothing and has nothing to report about that sale. The obligation does not disappear — it moves onto you, entirely, along with the record-keeping. Where Checkout is used and Meta does process the payment, it is back in the same position Mercari is.
The practical consequence is a bookkeeping one and it is the reason to run both channels through one catalogue rather than two apps. FLUF records the sale either way, including the local one you marked sold yourself, so the year’s numbers exist in one place instead of being reconstructed in April from a payout history and a memory of a Saturday afternoon.
A Note On Doing This At Scale
Mercari serves your own listings back to you about twenty at a time, and FLUF paces its read rather than hammering the pagination — a large inventory is walked over several passes instead of one burst. For most sellers this is invisible. If you are carrying well over a thousand active listings it is worth knowing that the first full read is not instantaneous, and that it is deliberately not.
The same restraint applies going out. Publishing several hundred Marketplace listings inside one hour is not a good idea on any local platform: it looks like exactly what it is, and it spends the recency advantage of every one of those listings simultaneously. Stagger the send. The stock is not going anywhere.
Four Things That Catch Mercari Sellers Out
Your location is now a ranking factor. On Mercari your address is a shipping origin nobody sees. On Marketplace it is most of the algorithm. A stale city on your profile is the single most expensive unfixed field.
Marketplace has no Buyer Protection to hide behind. Mercari holds the money until the buyer confirms; a local cash deal has no such structure. Meet in public where the item allows it, and treat the two channels as the different risk environments they are.
Don’t send heavy items and then leave the Mercari listing running. The whole point of moving a 40lb item to Marketplace is that you do not want to ship it. If it sells on Mercari at $25 with a $22 label, you have made the mistake the crosslisting was supposed to prevent. Mercari requires you to ship on your own above 50 lbs in any case.
Twelve photos is a Mercari number. Carrying all twelve to Marketplace is fine but rarely useful; the first image does almost all of the work in a Facebook feed. If you reshoot anything, reshoot that one.
Keeping Both
Marketplace does not replace Mercari and it is not trying to. Mercari gives you a national buyer, a payment held in escrow, discounted labels and a system that records what happened. Marketplace gives you reach into an audience that was not shopping, no fee on a local deal, and a home for everything a box cannot economically hold.
Run both from one catalogue, let sold-detection keep them honest, and if the same stock also suits a fashion audience it can carry on to Poshmark or eBay from the same FLUF inventory without another round of typing.
Pricing
FLUF Connect starts with 7 days for £1, with every feature available immediately. After that, plans start at £9/month for Starter, with no cap on how much you list. There is no free plan.
Every channel is included on every plan, and automation is included in every plan too rather than sold as an add-on.
Sources & Verification
- Mercari — selling fees — the 10% seller fee on item price plus buyer-paid shipping, the 3.6% Buyer Protection fee paid by the buyer, and free listing. Structure effective 6 January 2025.
- Mercari — the January 2025 fee change — no separate payment processing fee for listings created or updated from that date; older listings keep the previous structure until updated.
- Mercari — creating a listing — up to 12 photos per listing; prepaid label or ship-on-your-own; self-shipping required above 50 lbs.
- Meta Newsroom (22 June 2021) — more than a billion people visit Marketplace each month.
- Meta Newsroom — Facebook Marketplace gets a glow-up (13 November 2025) — one in four young-adult daily users in the US and Canada; over 200 million fashion items listed in the US; fashion as the second-largest category.
- Meta — fees for sales using Checkout — the current selling fee on shipped Marketplace orders. Read it there; the rate has changed more than once.
- Meta for Developers — Marketplace Partnership Program — listing APIs are restricted to eligible partners; there is no self-serve seller API.
- Meta — sell with shipping on Marketplace — how the shipped-order flow works.
Last verified 22 August 2026. Fees and policies on both platforms change without notice; where this page and the source disagree, the source is right.
Related guides
Related guides
- Mercari vs Facebook Marketplace — a side-by-side comparison of the two
Frequently Asked Questions
No, and this is the most common piece of stale advice about Mercari. The 2024 arrangement that moved cost onto buyers was reversed on 6 January 2025. Today the seller pays a flat 10% on the combined item price and buyer-paid shipping, and the buyer pays a 3.6% Buyer Protection fee on the same combined amount. Listing is still free.
Because it changes which items are worth listing where. On a $20 item with $12 of postage, the 10% is calculated on $32, not $20. The heavier and cheaper the item, the more of your margin the shipping component of the fee eats — which is precisely the stock that does well on a local platform like Facebook Marketplace instead.
Listing is free, and a local handover arranged in Messenger involves no Meta fee at all, because there is no transaction for Meta to sit inside. Shipped orders completed through Checkout carry a selling fee that Meta sets and has changed more than once — check it on Meta’s own fee page rather than relying on a number quoted second-hand.
Probably not, and this is one of the few pairs where that is the honest answer. Send anything bulky, heavy or fragile, plus anything that has sat unsold for months. Keep small high-value items on Mercari alone, where a national audience is the entire advantage. Send ordinary mid-range clothing, homewares and electronics to both.
It needs one action from you. Most Marketplace deals never become an order record anywhere — somebody messages you, drives over and hands you cash, and there is nothing for a system to read. Mark it sold in FLUF and the Mercari listing is pulled. In the other direction it is automatic: a Mercari sale takes the Marketplace listing down.
Yes, for both sides. Neither Mercari nor Facebook Marketplace offers a self-serve seller API — Meta runs a partner-gated Marketplace Partnership Program and nothing open, and Mercari's session is bound to your browser. FLUF works inside your own signed-in sessions rather than through an API.
Mostly, but they are written for a shipping buyer. Measurements, “smoke-free home” and dispatch promises all answer questions a local buyer will not ask, and the dispatch promises are ones you may no longer mean. Two edits carry most of the value: remove the shipping commitments, and add a dimension or weight to anything a person has to lift into a car.
FLUF Connect starts with 7 days for £1, with every feature available immediately. After that plans start at £9/month for Starter, with no cap on how much you list. There is no free plan, and every channel is included on every plan.