Yep, ain't that the rub - they can drop them on your toes with dodgy gearboxes (only happens when warm), Cold start issues (only happens next day of course) and no scruples shown or comebacks entertained ("didn't happen to me"), but if the one they bought has a squeak coming from the parcel shelf, you're a worthless piece of crap and you get dissed all over t'interweb and reported to Trading Standards.
Welcome to the retail motor trade people!