What Are Certified Pre-owned Cars?

http://www.carfax.com/car_buying/guide_to_certified_preowned.cfm - What are certified pre-owned cars? They are cars that have been inspected and repaired to an almost new condition and are a good alternative to a car for sale by owner options. This is because they combine some features of new cars and used cars by owner. Certified used cars carry a warranty from a manufacturer or an extended service contract.