Double post?
I bought CSS on disk too for like $30. It also came with all this Zombie Mod and other little games/mods.
It also came with DoD Source and Half Life 2 DM and Half Life 2 Lost Coast.
It was pretty good, but it sucks how you have to have Steam. I am really pissed of that you have to install it and stay online, even click "go offline" doesn't help, you still have to sign in online then go offline.