They're available at most new car dealers and are touted as the best kept, most dependable pre-owned car or truck you can buy.

Certified vehicles are supposed to undergo rigorous inspection and testing by dealership mechanics before being resold. They typically have fewer miles and cosmetic problems too, and come with some type of warranty, though such agreements can vary considerably.

But that peace of mind will raise the purchase price by an average of $1,680, according to J.D. Power and Associates.

Click here to learn more about certified used car programs.