Does anyone know a direct link to the purchase page for the USA?
The links from https://nextcloud.com/box/ point to a generic and hopelessly un-searchable WD.com page.
I would really like to buy a Nextcloud box. 
I started searching with exactly the same question.
I have followed every link on that WD site and while you can find the Box (without logos) nowhere does it show the package.
It looks like they fixed the link. 
It now goes directly to the order page for the Nextcloud Box.