@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.
From Funko. Marvel Comics' mutants will defend - or destroy! - your keys with these new figural keychains! Featuring POP!-styled danglers that stand 1 1/2" tall, these keychains of Wolverine (in his civilian guise as Logan) and Magneto are essential gear for all X-Men fans! Window box packaging.