i have had 311s in 12 and 20 . new in the 70s 80s thay were about 450 a 16 is hard to price but unless its cherry and someone wanting to fill collection ie 1 of all gauges i would say 200 max 16s have become the bastereds of the shot gun world .now if it were a 28?
There seems to be be alot of 16s around here the guns go fairly cheap but the ammo is fairly expensive. Saw a 16 gauge model 12 in good shape with beautiful wood go for 225 on one of the trade pages the other day.
Keep up with the trends, avoid the fads, take your time and do work you can be proud of always