"As far as the 19th century, I would agree it doesn't seem like near as many examples out there. I'm assuming there are a few 19th century collectors that have just hoarded what they could and will sit on them for years."
If hoarding means getting one copy, then I agree. Most of these cards have less than five known copies of a particular card. People who do not collect these have no idea of how rare these cards really are.
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