If getting used, use a service like carfax.com, check up on the car..
If some one does a check on my old car, carfax shows it as being reported stolen. It will cost you $20, or get the owner to throw that in as part of the deal.
Also, if used, you may get a better price on a private sale than from a dealershit, but if you can, buy new, so you don't have to deal with some one elses problems..