9. Shelby EXP500 Green Hornet – $1.8 million (not sold)
When talking about the most expensive muscle cars, we have to mention the Green Hornet. The car received a highest bid of 1.8 million dollars, but that wasn’t enough to buy it. The Green Hornet is another experimental Mustang from Shelby’s heyday for those who don’t know (via Shelby Prototype Coupes).
Although it wasn’t the only one, the Green Hornet features the most innovative features like a 390 V8 equipped with fuel injection, unique disc brakes on all four wheels, and independent rear suspension. With this layout, the Green Hornet was a capable car that handled and stopped better than any other sports car. Unfortunately, the cost of producing those features was too high, and Ford and Shelby decided to go with more conventional technology.