The real experts will be along shortly. But, in the meantime, I didn't see a barrel length, if it's blue or nickel finish, what kind of grips are on it (and do they number to the gun?), does it have a wooden display case, condition of box or case if present, original tools and paperwork, etc. All of these things are going to bear on the value.
In short:
But, here's one to tide us over for the moment (NOT THE OP'S GUN) :
Look something like this?