No way to tell. The serial number does not tell make, model, and condition.
50-100 USD
Gun shop, gun shows, internedt auction sites
There is no set price. Rifles and shotguns made before 1968 were not required to HAVE serial numbers. I have several dozen in my collection, and not having a SN does not add to the value. However, REMOVING a serial number from a gun is worth 10 years in prison.
Please state the guage and condition of the gun
Serial number 787416
It is worth as much as you can get. Most BB shotguns "wallhangers"and such are $100.00 and up.
1980 and 0-300 USD depending on condition.
made 1904.....................
That would depend on whether it is a shotgun, rifle, or handgun. Also on who made it.
Value of gun= make+ model+ condition. You gave us none of the 3. The serial number conveys no information.
10-1000 USD depending on exactly what you have.
Impossible to value with just the sn and no other details beside "shotgun".