Hi -- I don't have used ones (I need them all myself , but at
Peterson, new ones are $5.02 per piece.  Maybe this is okay for you.

Regards
Harald M. Mueller

 [ Peterson Electro-Musical Products, Inc.
 [ 11601 Mayfield Avenue, Alsip, IL 60803
 [ tel.: 1-708-388-3311
 [ http://www.petersonemp.com/
 [
 [ -- Robbie