A stab at: Whatever your agreement understanding of, is, according to your conversations, e-mails regarding transaction would dictate, should dictate your actions. My common courtesy for a forum member would be to have no "out of pocket" expenses for item, as party doing the favor, is already going to some activity to help out. Now if a buddy of mine of 30 years said "Hey man, not a problem, you can give me the coins when I see you", that may be different, dependent upon your relationship.