More Stuff Added.....I didn't realize I had this much stuff. Willing to entertain low ball offers. Send them my way.
Full sized Dover scores:
BACH, J.S.- The Art of the Fugue & A Musical Offering
BEETHOVEN- Missa Solemnis
von WEBER- Great Overtures (includes Oberon)
Smaller sized scores/ Study Scores:
BACH, J.S- Catatas No. 1-4
BEETHOVEN- Symphony No. 5
von WEBER- Der Freischutz
Music Texts:
Harvard Biographical Dictionary of Music
Norton Anthology of Western Music
JEPPESON- Counterpoint
SIMMS- Music of the Twentieth Century
BERKOWITZ- Musical Compositions
BRUSER- The Art of Practicing
OCONNEL- The Victor Book of Symphonies
ALDWELL/SCHACHTER- Harmony & Voice Leading
GREEN- Form in Tonal Music
SALZER/SCHACHTER- Counterpoint in Composition
BERRY- Structural Functions in Music
PISTON- Harmony
McHOSE- The Contrapuntal Harmonic Technique of the 18th Century (1st Edition 1947)
Music/Brass Books:
Begel- A Modern Guide for Trombonists and Other Musicians
Stravinsky- Poetics of Music
Wick- Trombone Technique ***pending***maybe

Free Pack: Pay the $3.61 shipping and its yours. They Sueta books look like a 4th grader had them, fair warning!
Rubank: Intermediate Method, Advanced Method Vol. 1, Pares Scales
Sueta: Book 1 and Book 2
Teacher's Guide to the Brass Instruments by Robert Getchell (published by Selmer 1959)
Mute:
Wallace bass trombone practice mute with cork alteration to reduce resistance a bit