Other than a mileage history, ignore Car fax and others. Not every bad thing shows up and some minor things are tagged as dire. Nothing beats an in person inspection by a mechanic.

My SL was tagged at some point with " Moderate rear damage " , this would make you think rear bumper / support / tail lights / tail light panel. The actual damage was a rear bumper cover tear / shallow dent in the spare tire well from backing into a high curb / lawn mower. I'd hardly call this " moderate " but it could cause some to flee from the car.

The same car had the front bumper repaired 2x prior to me fixing it for the 3rd time ( low cars tend to tear the lower bumper. ) None of these two repairs showed up.

If someone pays out of pocket for a repair after a drunken night out, it likely won't show up. Nor will it if a car is repaired by a used car dealer after it was traded in.

CF is a shake down of car dealers, their advertising paints non subscribers as shady by convincing those with little car knowledge only CF knows what a good car is. This would be like me offering potential employees a certificate showing they are not criminals and convincing employers those without a cert are hiding something.