Why it's on the list: Used Price; DepreciationThe Kia Optima is something of a conundrum. It has both a very high used priced as well as a high depreciation rate. A new Optima costs $21,350, and a 2011 model ranges between $15,500 and $16,700. Those prices are relatively close to each other, especially when you take into consideration the Hyundai Azera. However, a $5,000 depreciation in two years is significant. In another two, it won't really be worth selling. The current price for a 2011 model is still pretty high. It is close to the starting price for a new model, which is why it is even a factor for this list. It's a good thing the Kia Optima gets pretty decent gas mileage at 24/34 mpg city/highway.