6. Audi R8
When the first-generation Audi R8 appeared on the market, many people fell in love with it, and it quickly became a dominant and popular model. It offered tremendous power for a reasonable price – under its hood was the V10 engine good for 550 bhp and mated to a manual transmission. These R8 versions are scarce, and they are very desirable, so, if you stumble upon one, make sure you don’t miss a chance to buy it.