allis chalmers model G... what are they worth?

I found a G model on craigslist near me and the guy says that he was told it ran, but doesn't know anything else about it.  The man that owns it has come down with Alzheimers disease and his brother is selling the tractors for him.  They are asking for offers.  He has 4 old john deere's , 1 farmall cub, and the allis G.  I was told they already had an offer of 1600 on the G.  Is that about right?  What would be a good price to pick one up for?  As far as I can tell, the sheet metal is good and tires look pretty new.

Edited by arkfisher - 15 Mar 2011 at 10:04am

I canttell from the Craigslist photo if this tractor has hydraulics.  If it does, anything under $3,000 would be a great deal.  Be sure toask if the owner has any of the lift parts (front and/or rear) and/or any implements.

$1600 is cheap, if it runs I would buy it. I paid $900 for mine and didnt know the motor was stuck, ended with having $3500 in it, so I would jump on it.