Meta AI Auto-Reply Offers Free Facebook Marketplace Items to Buyers

A Facebook Marketplace seller discovered Meta's AI assistant had automatically replied to a buyer's inquiry by offering an item for free — a comically bad failure mode that highlights the risks of deploying AI agents in transactional contexts.

In a reminder that deployed AI agents can fail in financially consequential ways, a Facebook Marketplace seller discovered that Meta's AI auto-reply feature had responded to a buyer asking "is this still available?" by offering the item for free, as documented by @teja2495.

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