Used vs. certified pre-owned: Which cars are worth your money?

There’s no question that buying a certified pre-owned car -- or CPO -- comes with certain benefits, the main one being that it's not a used car with a mysterious past.

However, experts at Consumer Reports say paying a premium price for a CPO may not be necessary.

Manufacturers offer CPO vehicles as more affordable alternatives to new models. They usually have lower mileage and fewer defects or needed repairs than a typical used car, they're protected by a manufacturer’s extended warranty and they go through inspections and history checks for potential repairs. Some also offer roadside assistance, free satellite radio and discounted finance rates on loans.

“These are all great benefits," said Jon Linkov, Consumer Reports' Auto Editor. "Consumers are really paying a premium for peace of mind, which may not be necessary.”

Non-certified used cars can cost a lot less than the CPO equivalent -- but you've got to do your homework.

“First, find a trusted mechanic who can inspect the car for any hidden damages or repairs that may be necessary," said Linkov.

While these tools are helpful, Consumer Reports says a clean history report doesn't necessarily mean the vehicle has never been in an accident.