Less than $100 if you're selling to a novice, $0 if you try to sell to someone who knows how bad they are.
IF your shotgun is the Smith & Wesson Eastfield 916, it has been out of production for some time. SOME (not all) parts are available from Numrich- see their website at gunpartscorp. You can also check with local gunsmiths, gun shows, etc.
If you actually have a Smith & Wesson model 916 shotgun marked "Eastfield", instructions may still be available from S&W. The shotgun was not a success in the market and was withdrawn after a couple of years.
- 50-275 usd
No more than 300 USd
Seldom go beyond 300 USD.
50-300 usd
100-400 USD
75-150 US Dollars
gunparts.com has them
Call S&W
$175 - $200
50-250 usd