2012 Ford Mustang Shelby GT500 Up For Sale September 9, 2017 cars-power Photo Gallery 2012 Ford Mustang Shelby GT500 supercharged, 750 horsepower V8 up for sale on ebay and RK Motors Charlotte US $119,900 . Galpin Auto Sports 750hp Shelby GT500 Fastback Widebody 1000 Watt McIntosh Source:ebay and RK Motors Charlotte