I recently went through and found I have some duplicates.

Any takers at say $5 each or 3 for $10, $3 each for 4+ plus postage.(2) or $40 for all 20 volumes.

(2) indicates two copies available.

CSVHFS 1987,1991,1993(2),1994,1996,1997,1998,1999,2000,2002,2004,2006,2011,2012,2016(2),2018

MUD 1987(2)