Amazon has a Video Games Gold Box today the Deal of the Day is Tomb Raider either version for $41 and you can get FREE shipping. If you're reading this within 4 hours of posting you can also get the 360 collectors edition for $75.
I'm glad I payed less than this when I preordered. It's a good game, it's just ridiculously short and the multiplayer doesn't make up for that. I feel like just when the combat started to really feel fun, and I had all these awesome upgrades the damn game just ends abruptly.