I've seen this sort of fraud before. At this level, which is fairly low as far as fraud goes, it's very unlikely that anyone will really get their money back unless they're within the Paypal refund claim period, or if you have a very good credit card company and you paid via credit card. The local attorney general probably won't be able to do anything about it for some time because it's such a small case. I used to deal with fraud like this on a daily basis and it almost never ends fairly or justly, this guy has probably spent most if not all of the money he's defrauded and that money isn't just going to come out of nowhere to be refunded. Obviously $250 isn't worth hiring a lawyer and traveling to his location for court, and that's probably not a possibility for most people anyways. Eventually he might get a class action suit, and may face jail time, but that will most likely not result in a refund either.
Sorry to say, but i don't think anyone can help other than to provide info. I would still send him a certified letter warning him that he needs x amount of days to refund you or you'll sue, but i honestly wouldn't actually bother suing him, neither would most people.