So after I saw this a while ago:
It's finally there, my 400USD Hyouka box!
(403.8 to be precise, about 70 of which are import fees of which 32 were custom handling fees from the postal service.)
It's obscenely huge!!!
And fairly heavy, the whole package with package material was almost 5kg.
Also the volumes came separate to the green box. The customs guy must have been very puzzled over those two unlabeled little boxes. (One was opened.)
The artbook turned out to be a bit of a big cheat though. 46 pages were all the illustrations the Japanese single volume BD and DVD releases and their artboxes held, which I was mostly after, so that's very cool as I have no need to get the show 3 more times from Japan for the packaging art. But the other
113 pages of the 150 were just a selection of screenshots and chapter title pages. I had hoped for some more key illustrations. Especially since the digipack volumes already duplicate half of those illustrations. =/
(Also looks a bit diffrent than the preview image. The backside is now just white and the front holds the whole illustration. I think I prefer that over that zoomed partial cut of the same image as show in the preview image.)