@SupaPhly part of the reason could be that they are more responsive to FOREX fluctuations than MS or Valve. The other reason is that we are so small for Sony that they can't be bothered to match what happens on the other platforms.
If you have both consoles it allows you to price shop, i've picked up a few games this way.
Star Wars: The Jedi Path - A Manual for Students of the Force
This ancient training manual, crafted by early Jedi Masters, has educated and enlightened generations of Jedi. It explains the history and hierarchy of the Jedi Order, and what Jedi must know to take their place as defenders of the peace in the galaxy - from mastery of the Force to the nuances of lightsaber combat. A single copy of this manual has survived. It is now passed on to you...