Many of us have bought a used car. The experience is not especially fun. Not to say there aren't good used cars to find – my first car was a '98 Nissan Maxima with 150,000 miles on it, but it ran like a charm. There are also lemons. The lemons look good and might even drive off fine, but a week later – they stop working. The used car negotiation is a battle of information asymmetry.