I'll keep this thread, since it seems to be a good discussion.
I found a roll of 100s with a rubber band around them. There was maybe 600-ish there. I asked around, and found the guy who dropped it. I asked him what the color of the rubber band was, he answered green which was correct, so I gave it to him. Later that night he led the most gorgeous girl at the party over to me and introduced us... I won in the end.