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?
I sold my lovely pair of polk lsi9's several years ago.  Regretted the decision.  I found another used paid but took a long time.. They are hard to find, but well worth the hunt. 

You might try a pair.  Perhaps in the $400 to $700 price range.  You can always resell them.  They have way less of a port problem than the Kef Ls50's (which did not work in my room - puffy low-end did them in).  drumbe
Clever way to find out which brands keep owners the happiest.
Thanks for asking!