Porsche never sold a 928 convertible, so an American coachbuilder took a 1982 car and cut the roof off himselfThis special 928 Cabriolet model is expected to sell for up to $80,000. Straman took this 1982 928 and chopped off the roof in around 1990, before the car was painted in a shade of Dark Olive Green, suiting the car shockingly well. What’s more, some of the Porsche GT’s original luggage compartment has also been retained, although it is a little smaller than what it once was. A 928 With A TwistBroad Arrow AuctionsSome less obvious tweaks were also made by Straman. This asks more than a standard 928 would, but the premium buys something no ordinary example can match, and you’d struggle to find a second 928 Cabriolet parked anywhere near your local cars and coffee.