I have a Browning Citori 12 gauge over and under shotgun with a 26" barrel. I have had this gun in it's origional leather carrying case for 17 years, and never fired it. The gun was only assembled a few times to look at. The gun has the Vector choke system, with full, modified and improved cylinder. If I sell this gun, what can I expect to get for it with the case? Thank you.