20. Mazda MX-5 Miata
When the original MX-5 Miata hit the road, it was an impressive car. It offered wonderful performance wrapped up in a lightweight package. But the car has overstayed its welcome, and nowadays these cars are a dime a dozen. The MX-5 Miata had a lot going for it initially with the lightweight size and even weight distribution. But when it came down to the lackluster features and performance, the Miata was a notch below the competition. There were innovative features later on such as a power-retractable top.
However, those who are in the market for a used sports car would be better off finding something else. At this point, the original Miata is just outdated. Maintenance and upkeep is a chore unless you can find a low-mileage model.