@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 Black Series - 40th Anniversary Artoo-Detoo (R2-D2) 6 Inch Figure
Kids and fans alike can imagine the biggest battles and missions in the Star Wars saga with figures from The Black Series! With exquisite features and decoration, this series embodies the quality and realism that Star Wars devotees love. Celebrate 40 incredible years of Star Wars action and adventure with these vintage Star Wars characters, including Luke Skywalker, Han Solo, Princess Leia, Obi-Wan Kenobi, and R2-D2, each with classic design and packaging! Since 1976, Star Wars has been capturing the hearts of millions with iconic characters, impressive vehicles, and a galaxy of stories that pass the test of time over and over again. Celebrate the legacy of Star Wars with these 40th anniversary 6-inch figures from the Black Series! Window box packaging.