As soon as Blizzard announced its real-money auction house for Diablo III, no doubt millions of gamers around the world began fantasising that they'd be able to make some serious money on the service.
Well, this guy claims he already is.
Reddit user WishboneTheDog has posted screencaps of his transaction history, which if legit show he's built himself quite the little business.
The revelation comes as part of an "Ask me Anything" thread on the site, in which he says he's going to report it for tax purposes (because it's income), that in the early months of the game he was in the auction house for 8-12 hours a day (making it almost a full-time job), and that he makes nearly all of his money on "same day" trades in which he gets an item and immediately "flips" it for a profit.
If you do the math, $10,000 in three months blows out to $40,000 in a year if he sticks at it. That's not a bad way to make a living, providing you don't get bored of the game.
Anyone with an interest in economics should really go read the whole thread, it gets into some pretty technical details on how he makes his money and the nature of the trade.