I mainly use it as a guide for bidding on cards for set builds because looking for comps on a 598 individual cards in a set isn't a good use of time. So, I have Beckett high book on my want lists and I will normally bid up to 33% of BV for VGEX, 40% for EX, and 50% for NRMT. I don't normally pick up a large number of cards on Greg Morris set breaks, but my rule of thumb is enough that I still manage to make enough progress to stick with the rules.
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