I have an M1 in very good condition.
It has 2 scratches from fixing on a mount though. 1 visible on the picture, the other one looks the same, is just located on the other side of the light.
The light is barely used and around 1 year old, has been stored most of the time since I bought it planning to get a proper night vision later but that never happened.
What wavelength do they have in them? I wonder if the emitter is any better than some more budget friendly options.
You may want to lower your asking price a little if you want a quicker sale since a quick google to find out more info on the model turned up a couple places selling it new for $105 shipped. Good luck with the sale though!