Need Help with Parker Purchase

[Rodney Gray]

I am looking into this gun to buy but I want to know if anyone can tell me if it's an original Parker or a reproduction. It seems to be imprinted with C. Parker & Co. verses the Parker Brothers. The barrel is stamped with "Fine Laminated Steel" between the barrels. It is hammered. The condition looks older and used. I tried to look for the identifying marks but couldn't make everything out very well. He says he believes it to be Late 19th, Early 20th Century C. Parker and Company Double Barrel Shotgun. Do you have any suggestions as to what a purchase price should be? The gentleman I am dealing with wants a decision very soon.