Selling barely used M-Audio DMP3 mic pre on ebay for 105 dollars plus 11 dollars shipping has about 20 hours use on channel A and none on channel B.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=250180702156&ssPageName=STRK:MESE:IT&ih=015
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=250180702156&ssPageName=STRK:MESE:IT&ih=015