Used Atma-Sphere M60-MK111 Tube Amplifiers

My husband recently passed away and left me with some high end audio components that I would
like to sell. Can someone tell me what these amps are worth?
Atma-Sphere M60-MK111 

Thanks for the help.
There is a Blue book feature on AudioGon where you can see what they have been selling for.  Another source is, where you can see what they are selling for currently around the world.  Or you can keep them and enjoy the music like your late husband!
Contact Ralph Karsten at Atma-Sphere. He can tell you exactly what you need to know.
sorry for your loss

The Music Room in Colorado recently sold a pair, call them. they are also a fantastic buyer of used gear I trust.

bless you

I'm sorry for your loss. I checked the A'gon Bluebook feature for you and it leasts the average price to be $3422. Consider that as one semi-reliable data point but it at least gives you an idea of the range you are looking at.
Thanks to all of you for your thoughts and counsel.  Moving forward!