3. Ford Mustang GT 390 Bullitt
To be honest, McQueen never really owned the Highland Green Mustang GT 390 he used in the legendary cop flick, Bullitt. However, the car became iconic and today car fans consider it to be one of the most valuable Mustangs in existence.
But basically, the car was a movie prop they later sold and thought it was lost. However, McQueen hired a private investigator in the late ’70s who found the car, but his offers were declined. Earlier this year, Ford presented the car after more than 40 years in hiding.