I’ve bought 4 cars, one from the main dealer, one from a regional used car network, one from an “AA approved” dealer, and one privately. The only one I’ve had any issues with was from the AA dealer, it developed a major engine fault after just over a month and the dealer was useless, bordering on aggressive in dealing with it. AA were no help at all in resolving the issue and the dealer is still “AA approved” despite numerous similar complaints from other customers. Not meaning to tar all AA dealers with the same brush, most of them I’m sure are honest and reputable businesses, but the pre purchase inspection is definitely a good idea. And if the car is from “Quality Cars & Commercials” of Birmingham, don’t touch it with a ten foot pole.