The seller is correct - this is a hard tin litho noisemaker to find. However, the condition is poor, so the asking price seems steep. Kirchhof made two complementary designs, both of which can be seen on page 204. Of the two, this one will be seen more often, all else being equal. I’d say fair value for the one on offer is $150.
Mark B. Ledenbach's vintage Halloween collectibles blog.