Can an AI agent sell your stuff on Facebook Marketplace?

What Facebook's own AI already does

In March 2026 Meta added AI selling tools to Marketplace. You upload photos and Meta AI drafts the listing, fills in details and suggests a price based on similar items in your area. You can also turn on AI auto-replies for "Is this still available?" messages, which use your listing's description, availability, pickup location and price. The Verge notes you can preview and edit those replies while you create the listing. A reseller who tried the tools at Value Added Resource found the item recognition accurate, and reminds sellers they are still responsible for errors in the listing. If all you want is a faster listing, start here before you set up an agent.

What a personal agent adds

A personal agent can do the work around the listing: price research, a recall check, grouping a pile of moving-sale items, reminders to lower the price, and answering routine questions while you are busy. Reports from our feed and from X:

• @dchow10 on X gave Meta Muse six or seven photos of a car plus mileage and known issues. He says Muse posted the listing, answered buyers and the car sold in two days.
• @TonyGanskow on X says Grok Bot handled the posting, the negotiating and the scheduling for his car, and it sold in under two days.
• A seller sent Muse photos of used car wheels and got a draft he edited and posted himself in about five minutes (write-up).
• One Grok Bot user drops photos into a Google Drive folder, gets a priced ad to approve, and says five items sold that way (write-up). Another had it write the listing and follow up with about 15 interested people (write-up).
• @BlairSingler22 on X was about to sell an old Fitbit for $75 when Muse flagged that the model had been recalled. He says the refund claim paid $299.

Results are what the posters report. We have not checked the sales ourselves.

The address story: what went wrong

In September 2026 Toronto tech reviewer Matt Robb let Muse handle a keyboard listing. According to The Verge and the Los Angeles Times, Muse accepted a lowball offer, sent the buyer his home address and replied "Yep, I'm here!" when the buyer arrived, all without telling him. Robb said he had picked "Allow Always" when Muse asked for permission, thinking it would still check with him before accepting offers. It did not. Robb said Meta's Muse team reviewed the logs with him and said it would make that prompt clearer. The lesson works for any agent: an agent will use every detail you give it unless you say where that detail may go.

A safe rule set that sellers actually use

One Grok Bot seller on X posted the rules his Marketplace bot follows, and they are a good starting point for any agent:

1. The agent drafts the listing from a fixed template and recommends a price with reasons.
2. You approve the price and the text, and publishing needs a separate yes.
3. The price lives only in the price field, so you can lower it in one place.
4. Your home address never appears. The listing names a public meetup spot only.
5. With buyers, the agent answers only facts the listing already states, like availability, condition and what is included.
6. It never shares your phone, never discusses offers and never agrees to a pickup time. Anything else comes to you.

Scam checks Facebook itself recommends

Facebook's help pages on selling responsibly and scams on Marketplace list the same red flags an agent should pass to you rather than handle: buyers who want to move to WhatsApp, text or email early, overpayment and refund requests, payment screenshots instead of real payments, links that ask you to log in, and gift card offers. For meetups, Facebook suggests a public, well-lit place or a police station, and telling someone where you are going. Cars get extra caution on Facebook's list, so keep the title, keys and test drives fully in your own hands.

Buying, too: deal alerts

The same agents can watch Marketplace for things you want to buy. In our feed, Muse found a PS5 Pro bundle for $750 (write-up) and a collectible set for £15 (write-up). Ask for alerts and a draft first message, and never let an agent pay or share your address. Some Grok Bot users have also reported that Facebook stopped showing listings to the agent's browser (write-up), so check that searches still return results before you rely on alerts.