This horn is very much like my own baritone, which I like very much. As such it would have a nice, robust baritone sound. The condition looks great and it includes the luggage-style case Besson was using then. From the serial number I'm guessing it was manufactured 1985, which was a good period for Besson. Buy-it-now price is $3,000 and shipping is free. There is also a make-offer button, but the $3k price seems fair to me.
SOLD FOR $3,000
https://www.ebay.com/itm/Besson-Sovereign-3-valve-Baritone-Model-BE-955-1-955-1/233420730642
Here is a playlist with a few tracks where I demo my own 955:
https://www.youtube.com/playlist?lis...qhGnU5H8HU27Xz