Very smart move! Worth it's weight in gold.
A couple of the newbie owners over here in NZ, after me advising them to do so, steered them away from a few. Two in particular got perspective car AA tested, came up with faults that wouldn't be necessarily visually obvious.
Another thing that has come up with two of the cars here, is rims looking tidy, not curbed, vibration on driving, proved to be buckled rims.
Also the AA probably won't know about the windows dropping about 5mm when they open and close to release pressure inside the cabin. If the windows don't work thusly can be off track, or worn out window motors.