If you want a front-facing or marching euphonium, this looks like a great deal! The condition seems good, and I believe Getzen is a respected brand in this realm. This has 3 piston valves, so it could make a decent practice horn for convenience. It comes with a Protec case as well. The buy-it-now price is only $299.
https://www.ebay.com/itm/GETZEN-MARC...9/254405258994