If you signed the title over -- the vehicle now belongs to the other person who also has possession of it. You're going to have a tough time successfully claiming it was stolen. Fraud? Scammed? Perhaps there's a criminal action in there somewhere, but not nearly as straightforward as someone actually stealing the car.
The point is - it is all AVOIDABLE. Don't sign title or give possession until you're absolutely sure you have your money. Certainty comes in the form of cash or electronic transfer. With any other approach there is risk. Do you feel lucky?
