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Jay MillerHal--I'll give you guesses but they are not worth much. For the scarcest HOFers I would say there are maybe 50 cards. For the most common HOFers, the Keefes, Clarksons and Brouthers of the world, I would say there are maybe 500 cards each. For example, there are 14 variations of McPhee that are known. Even though his card is one of the scarcest I find it hard to believe that there are not at least three cards, on average, of each variation.
John is correct. The scarcest non-HOFers are much scarcer than the scarcest HOFers.For those cards we are talking less than 10 copies known.