[abber]

This may be the wrong forum, but here goes. I am trying to help my friend's widow sell his firearms. I was wondering if you guys could give me some good advice about getting gun values. The one I really can't even find out anything on, is a Mossberg 500, 20ga, 28", modified choke, wood stock and foreend. It is probably 95%. Nice little scattergun. How would I go about placing a fair value on this gun (and others)? All help is greatly appreciated.