The figure appears to be made from recycled G.I. Joe action figure parts, and placed in a custom-made G.I. Joe-themed package. Here is the item as pictured on the website.
The seller doesn't appear to be the person who created the figure. They seem more interested in selling Shopkins. With a price of $800 on the figure, it isn't likely to sell anytime soon.
It seems unusual for Amazon to allow an item like this to remain available on their website. The company is known for removing controversial items, like the Confederate flag. How any item listed as "Hitler" does not raise a red flag somewhere is a mystery.
You can see it for yourself on Amazon by clicking here.