Thinking about buying this despite the reverse black gunk and likely cleaning. I don't know much about the series, however. Does it appear to be genuine?
For what it’s worth, I think it appears to be the N-2 die marriage. So that’s a decent sign. https://www.ngccoin.com/coin-varieties/coronet-head-cents/1828-large-date-1c-n-2-643/
Looks like N-2 to me also. Or at least that attribution seems to fit best. EF40 seems about the right price. The only hesitation would be the black substance on the reverse.
Looks genuine to me. Since I do not know what the surface conditions are like, I'd try to be no higher than 60% of problem-free price.
I don’t know, something seems strangely unnatural. Maybe it’s just the cleaning that’s giving it that look, but I have a hunch that it’s been tooled.
The reverse is pitch black - not an attractive look. The obverse surfaces look... weird. Yeah, it appears to be genuine. But I wouldn't buy this coin.