Gamefly just threw up this deal for Rainbow Six: Vegas 2 for $24 with free shipping (and I believe no tax). You probably won’t find this cheaper, and I’ve had pretty good luck with gamefly. It’s used, and if you ever do get a bad disc you can apparently just send it back for replacement.
I haven’t had to do that yet. And they come with box and instruction manual.
http://www.gamefly.com/products/detail.asp?pid=129550&boxshot=1
…and to think I paid full price for mine, and I haven’t even gotten through R6V1 yet…
Who else already owns this?