hifi engine

BELL 2420 tube amplifier / 1964

Hello Forum, my name is Herby
I have a tube amplifier Bell 2420, the state of professional TOP.
The device is available for sale, what kind of price can you ask for?
With operating instructions of ex Liebris 19th Mai1964 Switzerland and schema (the original is yellow)
NEW or created on paper or pdf. Has anyone buying interest in the device?
Many greetings from Switzerland