I'm not extremely familiar with these but have seen them all so don't consider them great rarities. Circulated examples are easy enough though. Demand for this sort of coin is soaring so fast that it's possible that supplies could be stressed. This could show up in prices for XF/ AU's. It's hard to imagine lower grade coins becoming much more valuable but it's probable that attrition has been staggering for these. A lot used to appear in poundage but they aren't as common in more recent years.
