i'll give it VG8 the reverse is stronger. the scratch would most likely detail the coin especially if it had been a little higher grade. at VG8 its borderline.
its a $300 coin if it graded straight. however the coin would be devalued due to the eye appeal and scratch. if the coin detailed then probably half that. I dont think its worth slabbing and would find some verdicare that would help stabilize the coin then place it in an airtite. you other choice is pay the grading fees and pay for conservation but its going to chew up most of the value. based on what I have been seeing lately I would only go with PCGS. subscription fee $69, grading fee $23, plus ship and ins both ways plus conservation. as you can see not much would be left and if it came back details you would lose almost all of the value