I have an opportunity to purchase a Marlin 336 30-30 that my father used to carry. My uncle, who owned the gun, recently passed away and his gun collection is being liquidated to help pay for my aunt's healthcare. I would really like to find out what year it was made. It has a serial number of 309171 and the folks handling the estate sale estimate it to be from the 1920-30's. I tried the oldguns.net site but that number doesn't come up for a 336. I am working from list provided by the estate so I am unable to verify the number. The asking price is $350 and they say they will consider reasonable offers. What is a good price and where can I find the year of manufacture? I know no pictures means a best guess for value but is it possible for this rifle to be worth that much?Can anyone help?