It's different for every card and grade. Any where between 10 and 10,000% from what I've seen.
Henderson rc from 9 to 10 is the example for the high extreme.
Prewar cards often have a big jump from 4 to 5. Not sure about that specific Ruth. I would guess 50-100%.
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Last edited by pokerplyr80; 10-11-2017 at 02:12 PM.
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