Just as trustworthy as a private buyer. Bought 2nd hand Mokka Vauxhall, to break down a month and half later. Upon AA’s arrival to establish that my gear linkage had disconnected and that this would have happened with a previous owner as the linkage was a RAC, AA standard temporary fix and that Wilson’s ‘when checking the car’ prior to it being released would have been well aware that this part needed to be replaced.
Luckily enough for me it was still under warranty or I would have been set back a couple hundred.