I remember seeing the MTM mod-ed one listed for something like $56k when I was looking for one to buy in late 2019... Guess the prior owner realized...
I have a super-cracked c/f panel available (pictured in the thread link below), but I assume you're looking for a clean one... I searched for months...
Put in an order for the RS6 Hotchkis on January 11th and after checking in a week later the vendor they provided an update of 'The Manufacturer Said...