I am guessing you have a model 870. It is a edition of the 870 shotgun
Shotgun Express was created in 1966.
Gamo made a Viper Express Shotgun not a Whisper Express shotgun. They do make a line of Whisper rifles but none of them are shotguns. In fact the Viper shotgun has been discontinued.
30 Lbs
100-350 usd
2012 remington express max
Remington 870 Express Super Magnum.
"Shotgun" means the passenger side.
You need to contact Remington for an answer.
This is a double barrel, over/under shotgun.
If you call out shotgun it means you get the front passanger seat in the vehicle.
You can find the value of an Eibar Animo Express 12 gauge shotgun by taking the gun to an expert at a pawn shop or at a gun store. You can also find the value by searching websites like GunStar online.
The average price of a Remington 870 Express Magnum pump 12 gauge shotgun "brand new" is about 300-450 dollars. I got mine used for $250