"..the fact that someone is going to pay 800 dollars for a blue TF skin just goes to show how massively popular that once little game called League of Legends has become"
First of all, I'm an active league of legends player but that's kinda cute. In dota 2, an item was bought for $38,000. The item was just a consumable x1 very very rare effect on courier. Just search for "most expensive dota 2 item".