Plymouth built 108 Hemi ‘Cuda hardtops for 1971 and just eleven convertibles, which is why this specific corner of the Mopar market operates on a completely different scale from everything around it. The car in question has covered 2,010 miles since new and was custom-ordered with the desirable boxes already ticked. Whether that adds up to a seven-figure asking price depends less on rarity than on paperwork. Here is what actually drives the numbers.