Feel for you, but it is part of the job. Morons that is. And morons who buy cheap cars are more likely to be a headache, because it’s usually all their dough.
You have to work harder with these cheap punters & if you know they are out of your area, then make sure they know before they buy the difficulty of any potential warranty issues...consider being the Sales Prevention Officer (SPO)
For all sales: Your pre-and post sale checks and paperwork need to be really good. The punters need to be told and sign for the fact that they have tested the car, (keep test drive logs) and all is well. They agree there is no faults with it (unless declared).
Tell them, and get them to sign to say, they understand the terms of your warranty and what’s covered (if you give one) and that in the unlikely event of there being any issues with the junk, that they understand it is their responsibility to get it back to you so you can exercise your right to inspect and repair under the CRA.
Show them and get them to sign the Pdi etc at handover
Best advice you have had is ‘if it feels wrong-don’t deal with them’. The Sales Prevention Officer is a very important role on the rare occasions he is needed
If you don’t have all the above paperwork protecting you, then just refund the idiot, but make them bring it back to you (unless their garage are prepared to go on record saying it’s unsafe to do so.) if you can get them to see sense. Remember though that if you force them, the probably not broken car, may well get a hard time in their hands on the way back to you.
Sometimes ‘retreat is the better part valour’ and ‘pick your battles’ is another cliche I like.
Most people are normal, and you’ll soon forget about this loon -but treat them all as potential screamers until proven otherwise & get your ‘ducks in a row’ at point of sale and handover always.