if the guy asked you for both kidneys what would you feel like? Would you feel obligated? Why is there any difference? IMO if someone asks for something and isn't willing to accept a no, then they weren't really asking were they? Repeat after me "it's ok to say no". $50, that's kind of an insult imo. what is my time worth to me and how much time does it take to box up a guitar and go to the post office? not to mention potential for him to get the guitar and say "hey there's a scratch here that wasn't there b4... you need to give me $100 back". furthermore, there is a good chance he's found someone willing to pay $1400 for it and regrets selling it to you. the smart thing to do is to politely respond with "sorry, not selling. here's a link to a few on reverb that I found, perhaps you can live with one of those" and not get involved.