My GF has been looking at '06 and '07 PT Cruisers and she has found some really nice ones with low mileage, but their Carfax reports show they were rentals. What kind of stuff do people do to rental cars? Do rental companies service them properly? Would it be a good idea to buy one if it's still under the manufacturer's basic warranty? I need some help because I know shit about cars! Thanks in advance.