This game is simple. Just choose how much money you want to spend, then the next poster decides what was in the mystery box, and decides how much he wants to spend. It doesn't matter if you give the person ahead of you a huge profit or completely scam them. Use whatever currency you feel like, and I'll have a link to a currency converter in case you're curious:
http://www.oanda.com...ency/converter/
I'll start;
$10,001