A very rare instrument, that could be useful for some situations. Instead of the usual key of Bb, this is in C. It's also unusual in that it has 4 valves. Seller says the compression is good, and the photo of the valves looks like there are in very good shape. Bid starts at $300.
LISTING WITHDRAWN - SOLD ELSEWHERE?
https://www.ebay.com/itm/304483149268