To answer a few questions.
Yes,, Alexander Sturm did write a couple of books. One was; "The Problem Fox." There were (7) editions printed. It's a childrens book. Alex wrote the book, AND did all the illustrations in it. (Side note, Alex is the one who designed the Ruger Eagle.)
And yes,, Alex's father was a sculpture artist. Together,, they did created a mold & casting of a metal figurine, of "Augustus the fox" as shown in the ebay picture. The casting has "Alexander Sturm 1941" cast into it.
The foxes are rare, hard to find, and usually expensive when found.
Many may not be collectors,, nor care about such stuff. But there are serious collectors who do care, and desire such things.
I have personally seen only a couple of the foxes myself. Radical Rod has one,, and allowed me to borrow it once for my display. And I had only seen one other until I was gifted one by my lovely BEST half as a Christmas present.
They rarely come up for sale & are desirable to a collector. If I didn't already have one,, my CC would have taken a hit when I saw it.