15. Buick Riviera Convertible
In the early ’80s, domestic convertibles were basically extinct. Apart from several conversion jobs, none of the car manufacturers offered a true convertible. So, in 1982, Buick decided to turn its Riviera in a highly exclusive, expensive convertible with the help of the American Sunroof Company (ASC), the outside contractor that did most of the fabrication.
The Riviera Convertible was the first open-top Riviera model but it was almost $10,000 more than the regular coupe. Despite the significant effort in producing and marketing this model, car buyers were reluctant to buy it. So, by the end of production in 1985, they only built 3,800 of them.