TromboneChat

I am looking for a used copy of the Anton Simon Quartet opus 23.  I'd like to play it with my quartet but new copies (Robert King edition) run over $60 and JW Pepper is charging $85!  I am happy to pay a fair price for one in good condition.

I want to clarify that this is a brass quartet (2 trumpet, horn, trombone/euph), not a trombone quartet.  I also am looking for a used copy of Peter Graham's "Timepiece" for same.