You might want to set up a Saved Search on US Audiomart for the brands you are seeking. This will give you notification anytime something new is posted that is a match.
Probably a dumb question
I am looking for an online or other dealer that handles top end used equipement. I have used TMR,Ebay, Craigslist, Facebook. Am having touble finding any Coda,Plinius Boulder,or Gryphon for sale used.