I have this unique Atocha silver (I guess this would be an 8 reales). It appears to have been separated from a stack or something due to the deterioration on one side.
I am looking for $500 worth of trade for it. I am really looking for a couple pillar dollars (8 reales) with 1700s dates. Also I might consider $2.50 or $5 gold. I'm really up for entertaining any offers even for banknotes too.
If you had documentation, I might be interested. But these things rely almost completely on such documentation as it is nearly impossible to determine what ship, if any it came off of and that is a large part of the value, especially the Atocha wreck.