Restoring or not restoring. From my humble point of view, it is not a question of money but a question of interest and motivation. I just love military rifles and I will restore mine just for my own pleasure. In any hobby, the value we give to something or we are ready to pay for is a pure personal decision.
So, from my perspective I would say it worth a restoration, as long as the owner has the will to do it. If not, it is also fully reasonable to keep it that way. The most important thing is to keep using the rifle, whatever for shooting or for showing, these items must stay in "life".
If I can add a point, the rear sight protector is mounted backward. The angle part must face the muzzle.
That's my two cents!
Martin