as for the oil pump, I'm looking at the working faces of the pump assembly... they all look like a mirror finish in the pix... thats why I said looks like new. the sides have machine marks in them... thats mostly how they were made. some of that may be smears from metal particles though... the thing to look at more closely is the aluminum housing... that should show way more damage than the steel gear & rotor.
there seems to be no damage to the working faces. the side clearance is worth checking. I would clean it up and run it by what I see