16: Porsche Cayman (987)
Porsche has been on an upswing for the last couple of decades. Their SUV models are selling like crazy, but the sports car market has remained stagnant. The Cayman is perhaps one of the most beautiful and underrated models to hit the market. With that being said, the Cayman has experienced some of the worst depreciation.
Therefore the Cayman has been fairly neglected compared to other models. The main problem with the Cayman was the dated styling. You’d almost mistake it for a 2003 model. Aside from that, the powerplant was one of the best that Porsche has used to date.