A very nice example of a Connstellation, which was the top-of-the-heap American euphonium then. Not much wrong with this one that I can see. Triggers looks complete. Hard case is included (original, or one just like it), and there is even a mouthpiece adapter so you can use a tenor shank mp if you like. The bid starts at $1,499 and shipping is free.
https://www.ebay.com/itm/124308187483