Used Bach Stradivarius 50BL double rotor bass trombone.  It was manufactured in the late 1980s according to the serial number (85901). This is a retired high school band instrument.  The hand slide is in good condition with no visible signs of rust.  Most of the lacquer has worn off and there is a dent here and there.  The bell is wrinkled slightly.  The tuning slides all work smoothly.  One rotor spring is unattached and one rotor screw is missing.  This trombone needs a cleaning as it has been sitting for a number of years.  There is no case and no mouthpiece. Serial:  85901