One recommendation, if you are buying a used car, and are in the Austin area, be sure to use the AutoPI service. They come and check out everything with the car. We've used them three times now, once they saved us from buying a lemon and twice they confirmed we were getting good deals. Well worth the cost.
Disclaimer -- this isn't our car, it's just the same make/model/year/color and looks exactly the same. We just don't have a photo of our car.