what are your top 5 gotcha's to look out for when buying a used car

What are your top 5 "Gotcha's" to watch out for when buying a used car. Post your replies to the message board at http://pub16.bravenet.com/forum/show.php?usernum 28462617&cpv=2
HELP others know what to look out for when purchasing a used car!
If you have a funny or interesting story to tell about buying a used car post that below your answer.
A free ebook will be compiled with the most frequently listed "gotcha's" available for down load at http://www.thriftmeister.com/auto.htm which will publish some of the funny and interesting stories in the ebook as well.
Until the ebook is published "time to depend on getting enough entries to produce a quality ebook" check back at the message board to view the responses as they come in.
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