Originates From: A running joke within RoboCop is an inane TV show with the catchphrase "I'd buy that for a dollar!", which people in the film's future universe find humorous. The star is the goofy Bixby Snyder apparently based on Benny Hill. However neither the name of the show nor the character are ever revealed in the movie.
The person says: Man, I'd buy that for a dollar!