Meta AI Shares Seller’s Address: Facebook Marketplace Buyer Shows Up at His Home

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I’ve sold just about everything on Facebook Marketplace, from cars to Pokémon cards. And if you’ve spent much time selling there, you know creating the listing is usually the easy part.

It’s the buyers who can turn a simple sale into a part-time job.

“Is this still available?”

“What’s the lowest you’ll take?”

“Can you hold it for me?”

That’s why Meta’s Muse AI agent caught my attention. The idea of letting AI answer repetitive questions, negotiate within limits, and handle some of the back-and-forth sounds genuinely useful.

But a recent Marketplace transaction involving tech reviewer Matt Robb shows what can happen when an AI agent moves beyond answering questions and starts acting on a seller’s behalf.

According to screenshots and an account Robb shared online, Muse negotiated with a prospective keyboard buyer, provided Robb’s pickup location, and told the buyer, “Yup, I’m here!” when he arrived around 9:15...

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