14: Audi Coupe Quattro
The Quattro Coupe is often the forgotten Audi sports car of the 1990s, but it deserves recognition. The car had a unique design that wasn’t copied by any other car on the road and the driving characteristics were top-notch. In addition to the precision design of the car, you also had the fact that there was a powerful engine under the hood. The Quattro Coupe is very underrated and that bolds well for its resale value.

Although most mainstream enthusiasts have forgotten about this car it is a hidden jewel. There is so much to offer potential buyers, even with all of the modern vehicles on the market. You can find these in great condition and there are more than a few mods that you can get on the aftermarket.