Wiinchester model 12, 12 gauge shotgun

I just bought my husband a shotgun from a pawn shop. The serial number is 1782850. The barrel is 18 inches (extends 1 1/2 inches past the magazine tube), smooth polished stock, very little wear except on the rails where the blueing has worn down a little, the barrel is smooth (no rib) with just a little bead at the end of the barrel. Is it worth anything?

This is to inform you that I measured the barrel wrong. I measured it from the end of the barrel to the front of the receiver. I'm guessing it's really a 20" barrel.