I've looked online at dozens of sites for used cars for sale and none are very well put together. Some you can search by name and some you can search by price. I want to find used cars for sale that is fuel efficient. How can you know what cars are really good on gas mileage? I have to find used cars for sale that are generally good on gas and then look-up its efficiency via a separate web page. Isn't this important to people? Apparently, CarMax is the only site that has figured out that people are concerned about mileage and not just paint jobs. I was so pleased when I decided to go to their site. They also have a place for customer reviews. I have never found used cars for sale that I wanted via CarMax, but I have to admit I haven't given them a fair shake. I don't know if they've reasonable prices or not. You really don't know until after the sale and you have owned the thing for a year or so. If mileage is important to you, check out their used cars for sale.