Let's put that claim to the test.
WWAs containing 4k discs in all cases.
50 GBP = 55€
(FAC 47 Ronin, for example) 1600 CZK = 59€
(CM Birds of Prey lenti, for example) 60€
So you're right.
But that's now that they've taken a step back with their pricing. They haven't sold out Hellboy II at 55 GBP, so they maybe they've found their limit for now.
55 GBP = 61€
If we consider their whole lineup FAC is clearly the longer standing of the 3 retailers. and have earned the right, moreso, than the other 2 retailers to charge these prices.
Using the same examples, FAC are on their 144th release with 47 Ronin.
BoP will be CM's 22nd release, whenever they get around to releasing it.
EB have gone further than both of them on their 6th. That's pretty bold. Now they have taken a step back on their 7th, but for how long?
All three should be cheaper, but if there's one retailer out of the 3 that has "earned" the right to charge prices on the higher end of the spectrum it's clearly FA, without a shadow of a doubt.
EB needs to improve their exclusive stickers and increase the thickness of the card stock used for their fullslips. I feel like those 2 points need attention fast.