The Butcher of Prague. I have a photo a friend gave to me that his grandfather (a US G.I) took back from Europe after the war of this guy. When I tried to sell it on Ebay it was immediately flagged and taken down.
Ebay is gay as fuck. They did the same thing to me when I tried to sell a WW2 pen-gun.
I held a Nazi officer-issued dagger a few months ago in an antique store. It was pretty awesome, but they wanted hundreds of Euros for it.