Saving 2k by buying a used car isn't going to help you a lot if money is tight. You'll be spending 2k in repairs and such instead of buying a warrenty. The RX7 is a nice ride, and I love rotorys, but 18k used vs a 20k new car isn't the way to go. You'll wide up spending more in the end. How about finding a used car for 10k, like maybe a Eclipse GSt or GSX or something like that if 20's to much right now.