The 1968 Ford Mustang driven by Steve McQueen in the movie Bullitt just sold a for a record $3.70 million. Whoa! the current owner's Dad bought it in 1974 $3500. That is some ROI!... The car now holds the record for the most expensive Mustang sold at auction replacing the 1967 Shelby GT500 that sold for $2.2 last year.
See the details here https://www.cnn.com/2020/01/10/cars/bullitt-mustang-auction-record-price/index.html