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Found it on amazon, if you're willing to order there,
mind the shipping + taxes if you order from abroad.
I found it in stock on bookdepository.com, but the price is too high in my opinion.
And then it's in stock on amazon.co.uk and also on amazon.de. The price is okay I think, but I don't know where you are from, so not sure how high the shipping would be.
The Deluxe version combines multiple volumes into one, that's why it's more expensive and has more pages.
As far as I know the Deluxe version is still releasing, meaning not every volume is out yet.
Volume 3 https://www.amazon.com/dp/1506712002 will be out in November this year.
Volume 4 https://www.amazon.com/dp/1506715214 March next year. And so on.
So if you wanna buy the full series right now, you have to go for the single volumes, not Deluxe.