Bass Trombone for sale - WANTED: BASS TROMBONE

I'm looking for an open wrap inline double valve bass trombone. I am looking to get one with a non soldered bell and interchangeable leadpipes. Also accepting trades for my Bach 50B2 Elkhart bass

please if you know anyone selling a bass like I'm asking for let me know!
My price limit is about $3500
thank you!