@reac65,
Hi, I'm a Russell Chatham fan myself, but not of the few prints I have so far seen online, though I haven't looked lately - more the paintings in his book, Russell Chatham: One Hundred Paintings.
He lives (if still living) in Livingston, Montana, and I think keeps a pretty tight rein on his work. You might google to see if he has a website from there..
If it is an actual etching, as opposed to another process, it might have some value (but I'm no expert).