THIS LISTING WAS IN ERROR - IT IS NOT A BARI-EUPH.
The Martin is not a well-known brand in the euphonium world, but they made nice instruments. A former student brought in an old Martin that was badly worn, but it played very well. The curved bell is adjustable, which makes it more useful in some situations. A rough looking hard case is included, but it looks mostly like the covering is coming off - otherwise the photos make it look sound. There is nothing fancy about it - just a good instrument that was well made. The asking price is as high as I would want to see it: $475, but there is a make-offer button. (The seller is not a musician, but that could make them easier or harder to bargain with.)
https://www.ebay.com/itm/325567899927