This was listed for a $6,000 OBO auction, but ended very quickly for $2,500.
It’s an officially licensed controller by NubyTech and Nintendo. NubyTech released the Mega Man Nintendo GameCube controller, but decided against releasing the GameCube Zelda Controller due to higher costs.
This controller was to be released in an oversized “book” box. It is non functional but has a little leather outfit at the bottom end of the controller and was an expensive mock-up done when the licensing was ongoing.
According to the seller who often deals in such materials, they only know of two of these that exist and have never seen the second one.
Auction Here (Ended)