Who has told a buyer that what you have is not what they need?

First time in a while but the guy buying my 512 is a little over his head. That doesn't make me any smarter than him about this stuff but I think he's been watching a little too much Street Outlaws lol. Is he getting a killer deal? Yep. Am I getting fair market value. Well I set the price so no argument there either but the money won't change my life and he's a good guy just misinformed.

So who else has looked at the big picture and told someone to walk away and no harm or foul?

JW