What are the speakers you very rarely find in the Used market(Audiogon or Anywhere)?


I'm looking for Vandersteen Quatro CT, Wilson Sabrina or DeVore Fidelity Orangutan 0/93 or 0/96. I rarely find it or in some cases, before I make an offer, it is gone. What other speakers are a rare find?
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Fulton Model J, Wilson WAMM, Infinity IRS, Stax, Beveridge, Dayton Wright, Magneplanar Tympani T-IVa, Eminent Technology LFT-6 (I’m looking for a pair).
i can recount..every magical moment I spent with the Dayton Wrights in Cleveland...tagging along with my Dad the audiophile trumpet player.... Al Hirt ripping away on Carnival of Venice...

I was probably 12 ???????

We had half concert grands, Dad wanted the whole deal, so we always listened to thise also...
I haven't been looking really hard for these but I don't even see used Spendor D7's come up often in the US.
I almost never see Sonus Faber Extremas for sale here on Audiogon, or anywhere else for that matter.