How to value cards in submissions?

In various submission levels, there are price cutoffs (cards valued under $500, etc.)
How do you know how to value these for the purpose of submissions, when an older card may be worth $150 if it grades a 7, $600 if it grades an 8, or thousands if it graded a 9.
Based on what you've seen, is there an effect on what you choose to value/insure your cards and the actual grades they receive?
Collecting my sports heroes, Roger Staubach and Kirby Puckett.
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Comments
you would like to be paid if the cards are lost or damaged.
Just don't send a bunch of $1000 cards and declare their
value to be $25.00 each, and you will be fine. Just be fair
and use your common sense.
The fees are not based on final grades.