I have the opportunity to buy a Marlin Model 90 16 gauge. I have to pick the gun up this weekend if I want it and can't find any up to date prices online and I don't have access to the Blue Book. The gun is in very good shape. I don't know the serial number. I'll try to get it. I do know it has a space between the barrels which from what I've read means it was made after 1950. If anyone has an idea of what the gun might be worth I would really appreciate the info. I hate to pass on a find like this but I don't want to overpay. Thanks again for any help!