Realistic Valuation Help

My Krause catalog values this coin at $8000 in XF condition, yours looks AU to UNC so I would say that it's worth at least $10K.

However I do know of some counterfeits, so check the weight to make sure it's original, it should be 14.34 g.

Wow, what a stunner of a coin. Sure does appear genuine, though the flash makes it difficult to see if the coin is uncircualted or AU.
There has not been a comparable example on the American or European market in quite a while. If it's mint state and slabbed by NGC, it would have a practical market value today of $15,000 to $20,000+ (depending on number grade). On the other hand, an AU would be closer to $10,000, perhaps $12,000 for a high AU.
Heritage had one last year, but it was a VF details that had a significant portion of the perimeter shaved off. A relatively common date would have sold for basically gold value in that condition, but this date still did over $800.