Geez, $34.99 for the id Super Pack which has pretty much every single iD related game ever, from Wolf3D to Spear of Destiny to Doom 3 to the entire Quake series (well, not Quake 4 sadly). I know the "you save $159" is a bit contrived, but still, under $40 for every iD game ever? Even if I get all nostalgic and want to play the first FPS I played ever? Tempting.....
Note: I'm not a steam shill, honest. Also the Edios pack looks pretty good if you're into those games (Hit Man, Dues Ex, Theif, etc).