Based on the photos, this one is in very nice shape. The listing says it is "seller refurbished" for whatever that means. The piston shown looks in very good shape. The horn has 2 curved bells. This a "bid" listing and there is no set price. [[There is another listing in this topic for the SAME horn, with a buy-it-now price of $3500]]. I'm guessing the seller is not a pro at eBay listings - that could turn out to be really good or not for the bargain potential.
ITEM HAS BEEN SOLD. IT SAYS $531.99, BUT I FIND THAT HARD TO BELIEVE!
https://www.ebay.com/itm/234528696738