The good news insofar as quality shotguns go is they never really wear out.
The bad news insofar as quality shotguns goes is the same.
There IMO is a glut of used and very serviceable shotguns available today and with the rising costs of creating them little incentive to buy new ones.
Just go to any sizable gun show or have a look at one of the online gun auction services and what you see will bear this out.
Case in point: I have a cased two barrel AYA Model 2 set I recently acquired. The cost to build this set back in the 80's was around $7,000. I got a quote a few months back from AYA and the cost to duplicate this set today is $13,930 exclusive of shipping and taxes.
Jim