Pet Scam
This scam has been all over Craig's List for the past 2 or 3 months, it's usually an ad for purebred bulldogs, pugs, or other expensive breeds. It seems to have dropped off lately, the CL people seemed to have caught on to the scam and mercilessly cancel the messages (animal sales are prohibited on CL anyway). So the scammers have moved on to other venues in search of new victims.