Or that one contestant from 1976 who turned down one new car after another, thinking one of them was a Zonk (she re-appeared on the 2003 version and met that very same fate)!
Wasn't that the episode they brought Monty back pretty much just to do that one deal?
And how about the woman who won the same car three times on the same episode? (She won a car, traded it for a Big Deal door, which she won, and which included the car - and then traded the Big Deal for the Super Deal, which she also won, and which included everything in her Big Deal.)