Possible a WWYD too.
I bought a car as I needed one for a uni placement. I only needed it for 3 months, so I didn't spend a lot (under 1k) but it was nice enough, low mileage, few months MOT and a warranty. It had the tracking repaired under the warranty and I've had no other issues with it. I've had it 5 months now and MOT was coming up, placement was over so no longer needed the car and didn't want to keep paying tax and insurance so decided to sell.
A fortnight before MOT was due a guy came to view the car. He was Italian but spoke perfectly fluent English. He said he didn't want to drive the car himself just asked me to drive him round the block. Had a cursory glance under the bonnet but admitted he didn't know really what to look for, then said the car looked great compared to similar second hand cars in his home town of Naples. I stressed both in the advert and when I saw him that the MOT was imminent and that I didn't know if it would need any work or not. It was well priced due to the short MOT. He decided to take it there and then, filled in the paperwork, paid cash and drove home in it.
Fast forward a couple of weeks and I get a nasty email that I must be very pleased with myself selling a shit car that only lasted a fortnight before failing it's MOT. That the brakes were "falling apart" making it dangerous and I had endangered the lives of their children. I got the sense it was perhaps written by the man's partner as it wasn't written how I'd imagine him to write given English was his second language.
I replied that I had made it clear the MOT was due and I had no idea if it needed work and that frankly it was nothing to do with me if they chose to buy a car without checking it properly and then drive their children in it. I also find it hard to believe the brakes were that awful as I had my mechanic, a long time family friend, check it out for me when I bought it. They have replied saying "How dare you bring my children into this" when it was them who brought them up in the first place! I have not responded but it's really stressed me out as obviously they know where I live etc.
Am I in the wrong here?