Trying to find out a little more about these markings...

[Harlan (Deceased)]

Depending on the wear on the muzzle in addition to the dark bore and no sight or magazine I think anywhere from $400-$500 would be fair for both of you.
Adjustable sights and magazines aren't very hard to find and it will probably make a good shooter.

*** Good question Frank - (You posted while I was writing)
The rebuild stamp on the stock detracts a little too