Posted By:
peter chaoGil,
Well, there are 2 ways you could do this. First, you could look for a vintage set with a well-known population and distribution and then look at the percentage that are actually slabbed and their condition. This is probably not feasible because there are few if any vintage sets with a well-known population.
Secondly, you can look for at modern cards with a well-known population and distribution and then look at the percentage that are actually slabbed and their condition. This is more feasible but what's true for modern cards might be very different for the T-206.
Peter C.