Quote:
Originally Posted by swarmee
Really, for 1950s-70s Topps, it's an exponential increase as you move up towards 10.
Say a card is a $1 1956 common, raw. Maybe something like this:
PSA 1: $1
PSA 2: $2
PSA 3: $3
PSA 4: $5
PSA 5: $8
PSA 6: $12
PSA 7: $20
PSA 8: $35
PSA 9: $75
PSA 10: $250
Is that what you're looking for? 1933 Goudey would probably be the same way, but all the values would be 5x since a common is $5 raw at least?
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This looks reasonable at least in a general sense.