Games discounts stickied

It would be awesome to have a Game discounts stickied thread!

I've been lurking through this forum out of curiosity, and i've already bought Dx:hr(a) and Darksiders with quite a discount! I've seen brink as well, but that game is kinda fail, so i didn't want to buy. But anyway, the thing is, a stickied thread would be nice, it could promote more gifting, maybe?
I've seen a thread with various sites wich may or may not have nice prices, but i lost it.
What do you think?