craigslist

Man, these incompetent scammers just keep on coming right out of the woodwork. In this case, it sounds like the scammer was in way over their head from the start. On top of that, they'd clearly overplayed their scam to such a point that it was just going to be too easy to rightfully shut them down. Hence, the payment request and what we'd imagine was a very surprised and displeased scammer.