What is the best USED Speaker Under $10,000

For less than 9k you can have a new pair of Charney Audio Companion with Voxativ AF 2.6 drivers. Your choice of cosmetic design with the wood used and paint colors. Very engaging sound with deep bass that envelops the listener and draws you deep into the music. If you can get to NJ very worth the audition.
http://charneyaudio.com/

I actually was able to audition the smaller new Dynaudio with the Esotar 3 tweeter. I was really impressed by the sound.  Beautiful looking also.  Very impressive.  

I second the Charney Audio Companion with the Voxativ AF 2.6 drivers.  I wasn’t a believe in Brian’s speaker design philosophy until I went and heard them in person.  And then I went to the New York Audio Show to hear systems that are 10’s to 100’s of thousand of dollars to be fully convinced that for <$9K, this is probably the best I can do - and Brian is an awesome guy in general.  Pretty much a no BS-er who let your ears decide for yourself (rather than “pro audio” magazine reviews).

The pair I am selling in USAudioMart.

8-)

Without a doubt, JBL 4367.

Simply put they are state of the art, amazingly designed and engineered.