One feature of the Mopar muscle car era is the rarity of some models. With a range of power plants to choose from and the ability for a new owner to build his or her car to their exact specifications from a plethora of available options, there were many cars produced that had very few identical twins. Purported to be the holy grail “one of one” is this UK market 1967 Barracuda convertible. Follow the bidding here on eBay. More pics and video after the jump!