The 20 Greatest American Muscle Cars Get Ranked!

5.1971 Shelby GT500

Initial cost: $8,000. Value today: $1,000,000 Shelby's GT500 has an even more powerful 428-cubic-inch engine than its predecessors. The showy model came loaded with all the latest luxuries and was rumored to have 600 horsepower. And chances are considerable that it looks familiar.

The famous sports automobile was so unique that it was featured in the popular movie Gone in 60 Seconds, where it was given the name "Eleanor." The 1971 model was packed with features that would make it a fan favorite, including its Hollywood premiere and horsepower. It will cost you around $1 million if you wait until today.