Gamble
So I came up with the gambling hairs, flames and 3D items.
It should work like this.
1. 6 players enters the same gamble.
2. They all put in 1 - 5 items each.
The higher value your items are, the lower your chance of winning is.
But if you win with, lets say 4% chance of winning, you'll win more
because of that you had that low chance.
And the opposite around.
4. A randomized winner gets picked.
Ofcourse a player with higher % chance of winning is more likely to win.
And as said before. If you put in more items. You'll win or lose more items.
This should only work with hairs, 3D items and flames in my opinion.