Yeah, i think i did learn a lesson here.  I think next time, I will say "well, until money is exchanged, the item could still be sold to another buyer, and I will not hold the game."  I was being too nice to people by giving them days to come up with pick up arrangements, etc, etc.  On the other hand, i didn't want someone paying for it, then having it sit in my house for weeks either.  But yeah, next time i'm going to tell them I reserve the right to sell the game to someone else until money is exchanged.  A person's word just doesn't mean much anymore.