David229:
Not to be judgemental, but this kind of stuff always bums me out.
It would have been great (and memorable) if you could have just given it to him for your cost.
I have to agree with David on this one. Obviously we don't know the details and I'll give you the benefit of doubt in saying you probably didn't buy it with the intention of re-selling for a profit. Still, it would be really unpleasant for me to find out I was #76 in line and someone else just lined up to make a quick buck.
Just my 2 cents on this.
Back on topic, an odd thing that happened to me:
I bought my D&D 3.5 books one week before Gen Con 07 and the D&D 4th Edition announcement. I don't want to get another 3.5 vs 4E fight here, so don't go there guys, but once I started learning on 4E I decided I'd switch over, so the 3.5 books are now officially on the collection bookcase... Now that I think about it was just annoying, not odd !
OK, really odd thing that happened at Gen Con: I kept finding lost dice on the floor. I must have found 5 or 6 throughout the con, all on the floor.