Craigslist SCAM! Nothing new...just a heads' up

I once tried to sell a motorcycle through an online ad service (not CL) and had a similar experience. The guy offered me $1000 dollars over what I asked for the bike, and an additional $2500 to have it shipped. I wound up getting a huge check that the bank wouldn't clear because it was fake (had major suspicions long before I got the check in my hands). The guy called up, through an operator he was typing to, and threatened to find me and do me harm in order to get his money back. He didn't like it too much when I told him I didn't have the check anymore because the local police had taken the check and passed it on to the FBI. He hung up after that.