shotguns are worth what people will pay for them. given the state of the economy i wouldn't put any weight to what a book says.
you might look at shotgunworld.com and see what people are buying them for or gunbroker, gunsamerica, etc. IMO you're going to have a hard time selling any browning 16 gauge gun for $2000 right now...you might hang onto it for a year till people have some money back in their accounts. $12k krieghoffs are going for 7500-8000 right now...the market is dead just like everything else.