[quote name='Josh1billion']For those who don't know: Team Fortress 2 is free now, and Portal has been given away free on Steam in the past.
Half-Life 2 Episode 2 was also given away free during the Christmas thing on Steam last year, though that was something you had to win randomly (I did, as did many, though I gave it away because I didn't want it).. so that might be available if they do something similar this year.
So all of these games have recently ranged from very easy to somewhat easy to acquire for free.[/QUOTE]
Purchasing the Orange Box gives your Steam account the premium version of TF2, getting rid of the F2P version limitations.
Also, $9.99 for The Orange Box IS a good deal, as usually that's the price the set goes for during Steam deals, if not slightly higher.