Here is a valve trombone in wonderful condition, which would sell new for around $3,700 on Brasswind. Standard Bach hard case is included (square end profile, leather-like, or maybe real leather, trim). Bid starts at $1,500 and there is a make-offer button. Very low-price shipping as well ($24.26).
ITEM SOLD FOR $1,500
https://www.ebay.com/itm/183932024337?ViewItem=&item=183932024337