Does anyone know anything about Audioquest Obsidian cables?

A guy in my town is looking to sell a pair and I’m wondering what peoples thoughts are on this speaker cable?
I would ask to try them for a period. If not, then offer a small fee to borrow them for a try-out.
I to am interested in hearing thoughts- seems they were $20000 cables and Music direct is offering them for around $5000-
would like to hear some feedback from those that have heard them or about them- thks