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Posted By: Eric B

No, you start with the entire population of a set. There are many 5's, quite a few 6's, some 7's, a few 8's, couple 9's, scarce with 10's. As you get higher, there are less cards. So there are many times more cards AROUND the 8 grade than the 9 grade. Therefore many more low 8's than high 8's. And even less low 9's.

So really, if this half grade thing was accurate, there should be less than 30% upgrades on the 8's. By the same token, you should have close to 50% upgrades in the 3,4,5 range.

If half the 8's for vintage cards get an upgrade, then statistically the grading is less than objective.