All Quake games for $15

Right now on steam you can pick up all the Quake titles on steam for $15.  This is a killer deal and those of you who have been eying the quake titles should definately cash in on this great deal.   For $15, you can purchase Quake, Quake: Scourge of Armagon, Quake: Dissolution of Eternity, Quake II, Quake II: Ground Zero, Quake II: The Reckoning, Quake III Arena, and Quake III: Team Arena.  Quake was quite a revolutionary game.  It truly brought gamers into a true 3d environment.  Gone were the 2d days of Doom, Dark Forces and Duke Nukem.  Quake forever changed the gaming world