I have an old Gastinne Rennette sidelock shotgun that I would like to sell. It is a 12 gauge and the reciever and barrels look very good. The bore and chamber is perfect. The buttstock has a wood checkered butt area and has some pretty good scratches on it. The forearm is in good shape with extensive checkering. Any ideas on where I could go to get a value on this and to also market it? THank you, Kurt