Why it's on the list: Used Price; Fuel; MaintenanceSecond on our list is the Dodge Challenger. This is one of two Dodge vehicles that have made it on our list. For the Challenger, the price to buy it used is higher than you'd expect as the car doesn’t depreciate as much as others. While this is a good thing if you ever have plans to sell it, from the get-go it's going to cost you. On top of that, it doesn't get great fuel economy, at 18/21 mpg city/highway, making fuel costs even higher than if you bought a 2013 model that gets 18/27 mpg city/highway. What pushes the Dodge Challenger over the edge is maintenance costs. It's not a cheap fix, and if you buy one that hasn't been taken care of, expect to see the money in your wallet vanish as soon as something goes wrong.