[quote name='darkclawsofchaos']Just so you know, L4D2 is coming out soon and it is said that it contain all the game modes and campaigns in the first L4D.[/QUOTE]
Rumors at this point, but it won't surprise me if they release the campaigns in a later DLC.
$37 for the Game of the Year edition at Target this week
also
$34.98 if you happen to find the Regular edition in Target's clearance rack
I also do believe Game Crazy might have it used for $30