You might want to check out Gunbroker.com and see if a similar gun comes up in the listings. That could give you a rough idea of what people are willing to pay. As with most things - it is worth what someone looking for one is willing to pay :-)
The value of a Savage shot barrel 12 gauge single trigger shotgun depends on its condition. This gun in excellent condition is valued between 450.00 and 550.00 as of 2014.
100-400 usd
500 USD
100-10000 USD depending on exactly what you have, condition, etc..
@ 100 USD depending on condition.
Are we talking about a auto-5 shotgun,or a BPS(browning pump shotgun),or a over-under shotgun(citori, or superposed)These answers would help me determine the value of your shotgun which was made in 1980.
500 USD
Pull the trigger
Depends on the shotgun.
375-550 dollars, depending on overall condition of your shotgun.
It is a lever inside the trigger guard, forward of the trigger.
The 870 Remington shotgun used to be a popular candidate for a "release" trigger.