Hey OP, I am certainly sorry about your loss. However, it was an avoidable scam. There's been lots of press about money order scams on craigslist in the past years and the site itself posts nearly on every page to never accept any money orders because its a scam. It's an expensive lesson to learn. Perhaps be grateful you didn't get arrested for cashing a counterfeit money order, because I know someone who was just doing the same thing you did.