DiveWrecks said:My guess is around $75-$125 US. Yours is certainly better than this one for $65:
http://cgi.ebay.com/POTOSI-BOLIVIA-2-REALES-1791-PR-BUSTO-GRANDE-BELLA_W0QQitemZ350160188492
By the way, your's is not a cob (hand struck), it is a milled (machine struck) bust or portrait coin.
Great find!
Stan
DiveWrecks said:$65 is overpriced and is why the seller is accepting best offers. The coin is still for sale.