This isn’t my sale, but this looks like a fantastic deal!
https://www.ebay.com/itm/234278972368
This looks to be in very good condition and comes with a BB1. I’ve never seen one of these go for under $4000, so I don’t think it will last long. I’d consider buying it, but I’ve never tried one of these or any professional horn for that matter (Super excited for Midwest next month so I can change that!!). Anyway, just thought I’d share. Maybe someone else can jump in and confirm that this is actually a good deal since I’m no expert.