That is a great looking coin. Congratulations on the grade and PCGS Top Pop status.

Quote:
Here's my question— with so few auction comps, and it now being a top pop, how do I determine a realistic value?
I don't have a specific numeric answer for you, just a general statement.
The Top Pop status generally adds some value if your target buying audience are PCGS Registry Set collectors. If you get 2 Registry Set collectors bidding on it in a public auction the value can often far exceed expectations.
That said - there are only 8 collectors currently chasing a Mexico 8 Reales on the PCGS site.
That seems like a small pool of folks who might be interested in this as a Top Pop Registry item.
So - my suggestion is to compare to the price of other MS64 examples and thats likely to be close to where yours will end up valued in the market.
Take a look at my other hobby ...
http://www.jk-dk.art