As I mentioned in a previous thread, the coin hobby has a widely used rarity scale, and it's very specific. In other words, if a coin is in the category of say 7-9 known, and then a 10th one is found, it slips down to the next lower tier.
John's scale is a reasonable one but subject to opinion. Whether 1-10 is extremely rare, or 1-5 is, is debatable. We talked about the possibility of creating a rarity scale for baseball cards based on the number of each card known, but most of the people who responded didn't think it would catch on.
And looking closer at John's scale 500-1000 known doesn't strike me as very difficult. I would consider that relatively common.
Last edited by barrysloate; 06-01-2012 at 09:59 AM.
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