Lemon? I understand that you call a completely dud car a lemon, in the U.S. of A? I sold one recently. I did not know it was dud but within a short while one part of the front suspension went, and then a few days ago the other part went. It cost quite a bit of money to do it up again. The only thing was that I sold it to my daughter and in exchange I took her car, with which I have had no trouble at all. Now I have returned her car and have my old car. Would you feel so terrible if you had sold a dud? I didn't feel too good about it.
I don't think I'd feel terrible selling a lemon to some stranger, but selling one to someone I know would make me feel guilty...
Guilt is why It's a good thing not to do business with friends and family. I always feel obligated is something goes wrong
If I had absolutely no idea the car i just sold was a 'lemon', I probably wouldn't feel all that bad about it, despite the fact it was family. If I knew it was a dud and sold it anyway, I would feel bad, though. But I wouldn't do that. However, if I failed to make restitution, then I would feel bad about it. If there was no intentional harm done, then I see no reason to feel guilty.
I wouldn't feel all that bad for selling a lemon to someone (that is if I didn't know before-hand that it was one.) After all, it is their job to inspect it, etc. before buying the vehicle. As for family: I wouldn't deal with them ever. There's too much of a chance someone would get bad feelings towards you and it could possibly ruin the relationship you had with them. Meh, I never had much of a relationship with any of my weird relatives. "Hey, wanna buy a car?"