This for you who want to buy and download NBA 2k12 from Steam. since the 5th of October, NBA 2k12 (PC) ready for purchase online.
NBA 2k12 price: $ 29.99 for now. There may be a discount, but I do not know :p. Decent price to get and play NBA 2k12. This is the quick link to Steam: buy NBA 2k12 - http://store.steampowered.com/app/201020/
related with this post: NBA 2k12 PC Download you can download from a mirror link for NBA 2k12 PC, and full version.