It's always best to buy a used car as a "certified pre-owned car"? If you don't, then you're exposed to an "as-is" condition where you'll end up paying for various fixes. A certified pre-owned car or CPO is a type of used car. Most often late-model, they differ from other used cars by having been inspected, refurbished, and certified by a manufacturer or other certifying authority. They also typically include an extended warranty, special financing, and additional benefits. You'll find that CPO cars are priced close to non-cpo cars.