[Bigdaddy]

1. Different companies have different rules for grading
2. The rules change over time (pinholes, 'the card would never get that grade today', etc)
3. Even with the same rules, different graders will apply them differently.
4. Even with the same rules and the same grader, the same card may get a different grade when submitted at different times.
5. There are an infinite number and severity of flaws that have to be evaluated for a given grade.
6. There is a financial incentive for a grading company to encourage collectors to re-submit cards hoping for a bump. What if a company had enough confidence in issuing a grade that they would not regrade a card?
7. And finally, don't forget the conspiracy theory that a grade may, just may, be dependent on the name of the person/company that submits it.

Does anyone really expect consistency out of a process like this?

By the way, that is a very nice Mantle. His last, really classic card. Congratulations on a great acquisition.