Hey Danny:
While I have no idea about the worth of your gun I would like to recommend that you take some pictures of the gun for insurance purposes. With the new digital camera being out these days you can get a picure of all your valuables and have the digial photos stored off site somewhere in case of a fire or disaster wipe out your home. These pictures will help you recover the losses with your homeowners insurance company. You may already have these pictures and that's great. Like the old saying goes "A picture is worth a thousand words". Good luck in finding out the value of your gun.
Regards,
Moose1am