Well, I am going to add mine, since the whole thing still pisses me off, several years later. It wasn't the amount of money, but how I lost it.
Also happened at an Arizona casino (Gila River). The poker room had a "high hand" promotion during the early hours to keep games going all night. Anything full house or better goes up on the board. Best hand after the hour and a half wins like $250. In order to win, you must be playing when time is called. On this particular early morning, we were the only table playing and there were four of us, the minimum needed to keep the official game going.
At the time, I was already on the board with quad queens, almost assured the $250. As time got close, one local asshole (Sal) decides he is going to leave and go home. I have 15 minutes left till I collect, and his leaving would close the game. Even the other players couldn't believe this idiot was going to be such a loser. Sal only offered to stay the last 15 minutes if I would split the bounty with him. As I assume ANY of you would do, I told him to f@ck off. No way in hell was I giving him a penny. I'd rather lose the money. So he does leave and the two remaining guys decide to wait it out for me. They tell me to go pull some guy off the casino floor for one hand and offer him a free $25. So we wait.
With about 5 minutes to go, I walk out, grab some guy from the slot area outside the poker room with my offer. He has never played poker before, but what he hell. First hand. THE FIRST HAND... guy ends up with quad kings and wins the $250 high hand. Nice guy that he was, he did ship me $25 for the opportunity.
I still see Sal coming in all the time. Smug 80 year old douche that is still completely unaware who I am now or how the night unfolded after he left. I tell the story often, but no one seems to believe that Sal would ever do that. Pisses me off.