@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.
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Pop! Disney: Piglet Vinyl Figure (Winnie The Pooh)
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From Funko. Winnie the Pooh and pals are the latest additions to the Pop! family! Head down to Pooh Corner and find friends like Piglet, Eeyore, Roo, and Pooh Bear himself! Keep your honey away from the Heffalump and Woozle! Look for Heffalump's pink chase variant, a 1 in 6 rarity!