Best 40 to 50k used speakers

What would you consider the absolute best speakers on the used market, budget 40 to 50k max.Open to any suggestions thanks.

Id look for a pair of Von Scwweikert VR55 Aktives. Retail 60K I think. Should find used in your price range. Excellent adjustable bass, best tweeter that I have ever heard. I own them and all who hear like them.
A new pair of Wilson Audio Sasha DAWs will far outperform any used speakers!!!!!
@thieliste The Magico A5 has excellent price/performance with Herculean internal damping. At $22k it competes with $30k+ speakers.