I got all the characters and playsets for Disney Infinity (except for Bobba fucking Fett, cuz he's a Toys R Us exclusive.) Must have been worth several hundred dollars normally, but I just traded Steam cards I got for free from the local ISP for webcodes on Reddit, so I didn't really spend anything.

The Steam Winter sale has also been good to me. I leeched off the system. They give out free Steam cards just by browsing the discovery queue. Browsed mine everyday and sold the cards. Accumulated enough to buy Stalker: Call of Pripyat. Tried it out, found out I'm shit at the game, and refunded it.

Spent the refunded funds and a few more from selling cards on buying Monster High: New Ghoul in School. For my daughter, yes. I think.