The shotgun is a straight stock, double trigger, 3" 20, case color receiver. It is in 90% condition. It was made in the 1980's by Zabala Hermanos in Spain, it is marked as an American Arms York . It is marked for the Ruffed Grouse Society on the barrel. I am having trouble finding guns like this that have sold to establish a price. I would like to buy the gun, the owner says whatever I think is fair will be fine. I want to offer a fair price. Any thoughts on where I can check for value?