Just received a used TX-6 from B&H and honestly pretty disappointed with the condition.
The unit is visibly dirty, grime and dust caked around the knobs, between the faders, and along the chassis edges. This isn't "light use" dirty, this is "sat in someone's studio for years" dirty. I expected some wear with a used unit but B&H's used grading should be more transparent about actual cosmetic condition. It was advertised as 8/10, I cannot afford the full price and I am so disappointed.
The main menu is completely inaccessible. The Shift button and/or the encoder knob used for menu navigation don't work. I can't get into the main menu at all. Power cycling doesn't help. This isn't a display glitch, it's a broken control path that makes a core part of the unit unusable.