Can't be accurately answered without knowing if it is a revolver, semi-auto, caliber, finish, barrel length and all markings.
$150-$200 and up.
If your revolver breaks open like a shotgun, which I suspect it does, your serial number listed is incorrect. The gun was called the .38 Safety Hammerless and was made in various submodels from 1887-1940.
1978. 100-550 USD