I am not really sure as I have never bought or sold just a mech but I suspect that $75 to $100 is not out of line for one that has not been restored. I have not seen one turn up on EBay in a little while either.
I have a guy who is coming to see the machine and in all likelihood will buy it. He may want to get a mech if he can get the right one so I thought I would put the word out here to help anyone with a spare mech sitting around. If you are interested in selling one, PM me your contact information and I will connect him with you. HE sounds like a pretty nice guy. He apparently just sold a gas pump and is looking for his next project.
Thanks for the quick response.