Plymouth Hemi Cuda Convertible – $2 to 4 million
The mighty Hemi engine was an expensive top-of-the-line option for 1970 and 1971, available in coupe or convertible form. It cost around $900 more than the standard Barracuda, and it was installed in just about 600 coupes and only 17 convertibles during a two-year production period. Prices for those 17 cars ranged from $2 to a staggering $4 million.