Used speakers $7,000-$10,000

Uppermidfo is right,
The best deal on a pair of speakers on Audiogon right now is Long Ho's pair of Sony SS M9ED speakers. I own a pair also and this is a reference level speaker which is easily as good as any other $20k pair out there. New these were underpriced at $16k. People just need to get over the name and pretend they're Wilsons. I've never regretted owning mine and I've heard a lot of the big names.
But it doesn't matter as audiofools will turn up their noses and miss a screaming opportunity.
Vandersteen 5's, Eggleston Andra and the new ML Summit are other favorites of mine.
Bill

For that matter, if you ever found a pair of the SS M9es speakers, they're equally a fantastic bargain.

Didn't Stereophile rate those Sony speakers with the best of the best at one time?...It's been a while, I could be wrong.

Dave

These were designed for SACD and they are indeed exceptional speakers. Phillips/Sony had a demo booth of SACD multi-channel with these speakers at the 2000 and 2001 AES conventions.

I am not sure why they dropped the production of these great speakers... I only know that in 2002 and 2003 AES conventions Phillips/Sony switched to using ATC speakers for SACD multi-channel demos.

Probably a big company like Sony could not justify selling only a handful of speakers a year (this is a very very small market at such high prices and high quality).

Dave, you're right.
The SS M9ES speakers were borderline Class A and the SS M9ED are a Class A reference speaker, competitive with the rest of the reasonably priced class A speakers.

Rarely, the OLD, 3 box version of the Audio Physic Caldera comes up used. Phenomenal sound, imo. Within the last few months a pair was for sale on Audiogon for ABOUT 10,000. Audio Physic Avanti III's have been highly praised, but I've not heard them. Would try them out first with the Odyssey Stratos Extreme monoblock amps and Tempest Extreme preamp that I already own.