People think this kind of trolling on ebay, etc. is funny, but I don't think they realize that they just made a contractual offer. If their offer is accepted,

People think this kind of trolling on ebay, etc. is funny, but I don't think they realize that they just made a contractual offer. If their offer is accepted, they're legally obligated to pay up. If the sale price is $250k, and they already have a verified phone number, the legal fees to sue for breach of contract (and recover damages) might be worth it.