With the average price of a new car idling at over $31,000, you might be thinking about buying used . After all, the average price for a used car from a dealership is about $18,000. You can buy used cars through a variety of commercial outlets: franchise and independent dealers, rental car companies, leasing companies, used car superstores, and online. Of course, you can buy directly from an individual, too, but that route comes with limited consumer protections. Here are a few tips from the Federal Trade Commission, the nation’s consumer protection agency.