Source: Quinn-The-Eskimo-Vintage-Horns on eBay.com
This one deserves a bit more description. Quinn had it in his eBay store in April 2016 for a starting bid of 4K US, and a price of $5,200 US. I simply burst out laughing.
It doesn't matter that this Klingsor looks like it was made the day before Quinn listed it for sale, no Hammerschmit-made Klingsor sax is worth north of $4,000 US. Period. Full stop.
I don't know what happened with the horn. It didn't show as ever having sold through eBay... I wonder why. Maybe Hammerschmidt bought it for their museum--if they have one. Me suspects it sold more for closer to 1/2 the starting bid. Even that would have been a lot.