the coin has writing on the edge from the minting process. That is why is looks like there might be small edge deficiencies. In reality it's almost as good as new.
The coin is very much medal-like, it was probably minted for prestige rather than trade. Very nice and rare thing, again you certainly didn't overpay it. The condition, patina and the overall look are superb.
I suggest you trade a little, you will have more money for such beautiful things
I'm going to post some more stuff a bit later