For those who like the British concept for euphoniums, the Neo II is said to be a very good match. This is in nice shape with "low miles." Buy-it-now price is $4,700 and there IS a Make-Offer button.
ITEM SOLD FOR $4,450
https://www.ebay.com/itm/353693546666
(More photos in the listing, as well as a description of the blemishes)