I think it sold out. I checked when the post first went up and there were copies available, and then when I was trying to decide if I should buy it or not, and checked it again, it wasn't available any more.
I am tempted by SFxTekken, but I have a hunch I should wait until the ultimate version or w/e comes out. I bought SF4 and MvC3 early. I got into SF4 enough that it was worth getting it before SSF4 and the arcade edition came out, but not so much so with MvC3
http://www.amazon.com/gp/product/B004VKH9RM/ref=as_li_ss_tl?ie=UTF8&tag=dg05-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B004VKH9RM
I didn't see this posted anywhere, but yea, it's 5 bucks for the PC version. Based on the comments on Amazon, you can link the game to steam.
I was at the Nebraska Furniture Mart today, at the one by the Legends in Kansas, and I saw that they had DJ Hero with the turntable for $40, which is $10 cheaper than it is at gamestop right now. It was that price for the PS3 as well as the 360 versions. I didn't get to check the Wii version.
It appears that there is a price drop on darksiders at gamestop right now for 20 bucks new which is the same price that gamefly is selling it for now used. I'm not sure if it's temporary or not...