Volumes 1-3, 5, 12, 21, 24, 42, 47, 54, 70, 84, and Ear Training.
All books and CDs are in excellent condition.  They've been used but well taken care of.

All these Aebersold books cover Bb, Eb, and bass clef instruments, except Ear Training, of course.
Vol. 1  How To Play Jazz and Improvise
Vol. 2  Nothin' But The Blues
Vol. 3  The II-V7-I Progression
Vol. 5  Jazz and Rock - Time To Play Music
Vol. 12  Duke Ellington
Vol. 21  Gettin' It Together
Vol. 24  Major & Minor In All Keys
Vol. 42  Blues Nn All Keys
Vol. 47  Rhythm Changes In All Keys
Vol. 54  Maiden Voyage
Vol. 70  Killer Joe
Vol. 84  Dominant Seventh Workout
Ear Training

I'm a bass player.  I have used these books and have learned and grown greatly as a musician as a result.  Jamey Aebersold books are the "go to" resource for developing jazz musicians in particular, but are also very useful for students of other genres.  If you can play jazz and understand what you're playing, you can play just about anything else.

Volumes 1, 3, 21, 24, 47, and 84 focus primarily on theory.  Volumes 2, 5, 12, 42, 54, and 70 focus primarily on applying the theory by learning jazz songs.  Ear training teaches the student how to recognize intervals, chords, and chord progressions when he/she hears them.

These books are worth over $200.