[quote name='phil.c60' timestamp='1507112113' post='3383336']
Have I missed something? There seems to be no indication from the prospective purchaser that he is intending to buy it. He has asked for the location, has asked for the best price, and has said he will need to check before he commits to buying it. Your friend has volunteered a lot of useful information that was not requested, in order it would seem to try and progress a sale. If he has someone else interested and they make a firm offer, it's sold to them. The first one, to me, seems like simply a casual enquiry. First come, with a firm offer and commitment to purchase, is first served.
[/quote]
Exactly this.
No offer to buy was ever made - your friend had only a potential buyer who asked a couple of questions.
If I asked for the exact weight of the bass you were selling, I wouldn't consider you to be under an obligation to keep the bass for me.