I bought the vanilla version of New Vegas for only $2.49.
I would have payed double for the utlimate edition, but honestly, I doubt that I'll ever get to that DLC content. I'm still playing Fallout 3, and I do have the Game of the Year version of Fallout 3 with all the DLC, and I haven't even touched any of the DLC yet. So, I still have to go through the regular game, and then play all the DLC. I've probably played Fallout 3 for over 80 hours, but spend so much time just roaming the wasteland that it's the ultimate time sink.
I was very, very tempted to buy Witcher 2 for $4.99, but I have two issues with that game. 1. would I ever really get around to playing it ? 2. would my PC be able to run it properly ? So, just decided to hold out on that. The game that could get me is Skyrim for $9.99 or less. I'd actually buy it at that price, because I want to try messing around with the mods. However, if it's $12.99 or something, I'll still pass.
There are a bunch of games I'd buy at $5, but they are priced more in the $20 range right now. I have to wait a bit longer.