"Prices vary from gauge to gauge dramatically, but a good 12-gauge with a rib still can be found for $400 up. Smooth, durable, and well made, its a joy to shoot." Year 1980
"Prices for lesser 12s are more modest. Competition guns in excellent shape run about $800, and field guns in the same condition will run from $400 to $700." Year 1988.
What do they bring in today?
Foxie, if you don't quit taking that gem apart to measure things it's going to get worn out.