Quote Originally Posted by transio
If someone is interested in buying your car, do not let them test drive it!
You won't sell many cars that way. You do need to be in the passenger's seat though.

As for getting info on the guy, assuming the DL information is right, there are a lot of questionable sources that can get you way more info than what is officially available through NCIC. Smart use of google should turn up all kinds of services - here's one: datatrace The cops need a warrant for those kind of searches (unless you can figure out a way to claim auto-theft is terrorism), but as an ordinary citizen it is still enough of a grey area that these companies are mostly out in the open if you know where to look.

At the very least it would be kinda cathartic to call him on his cell and scare him. Might even make him swerve off the road if you got him at the right time.