NNC is a basement slabber run by ebay seller centsless. The numbers on their slabs mean nothing, treat them like raw coins.
Well, OK, if you're happy with it, that's what counts. I think it's at least 2 grades over-graded, which would put your acquisition cost in the ballpark. It is too much toned for my taste, so I would be looking for a different specimen. They minted nearly 20 million from this one Mint, so there are plenty to be had. Had they not sold it to such an astute buyer, someone probably would have paid the full asking price...good job!
As @PlanoSteve said, you did good on the pricing. I also don't care for the dark toning but that's me.
I think that’s just a junk coin. If you send it to me I will dispose of it properly for you at no charge lolol