This Mack is not perfect, but it in very good condition. The standard case is included. The seller describes the condition as:
Bidding starts at $499. Note that shipping adds about $175, so keep that in mind. Still, it could end up being a nice bargain!Mack Brass Euphonium. Light use. small dent near logo, and some spotting in the finish. Valves and slides in great working condition. Bell is in great condition.
SOLD FOR $540 - GOOD DEAL!
https://www.ebay.com/itm/115741463552
Many more photos in the listing.