There is only one true way to find out what your rifle is worth..... Auction! That's the worth that the last two men standing put on it.
Some people want a rifle like yours that looks like it's been there, done that etc. Others want something new in the box. I personally don't care one way or the other just so long as it shoots straight and a tiny bit better that I can. You can't ask for much more than that!
Incidentally, that rifle looks just like some of the well worn and used Rifles from the Far East. I'd like some photos of any markings on the butt as that's where we used to mark them with our main workshop identifiers.