What used speakers raraely come up for sale


Lets keep it under $7,000 used, but interested to hear what used speakers rarely get listed for sale because they are so sought after and if they do appear they get snapped up very quickly?  Cheers
spoutmouzert
Wilson Benesch Chimera..seen for £5k recently, were £24k. Utterly fabulous. I had the Acts for 10years these are way better but same sound signature. 
Silverline Bolero speakers  are rare and wonderful. Perfectly musical and the kind of speaker that one can stay contented with.  I miss mine.