10. 2005 Ford GT
According to Leno, he tried to buy Ford's last supercar two previous times to no avail. On his third time he was able to buy the twelfth model (of 4,038). Powered by a mid-mounted 5.4L V8 engine being blown by a twin screw-type supercharger, the GT is one of the best—if not the best—super cars ever produced by an American company. No wonder Leno wanted it so badly.