I had a very nice restored Fathom with orig backglass and new playfield that I sold a few months ago for $6,500 to another Pinsider.
Pictures can be viewed here if interested:
https://www.flickr.com/photos/tims_pinball_pics/albums/72157697972189641
FWIW, you might want to change your poll question to: "What is MY Fathom worth?" as I suspect that many may vote without reading your full post and understanding your intent.