Here is a great American euphonium, which was a mainstay in schools for decades. This version has the short-action valves, which is great if you have slow fingers or a limitation like arthritis. Tone and intonation on these horns are both very nice. The curved bell is adjustable. The condition is among the best out there. No case, though. Current bid is $550 and buy-it-now is $950.
ITEM SOLD FOR $550
https://www.ebay.com/itm/263636522654?ViewItem=&item=263636522654