Card Grading & ROI Blog
Working guides on PSA grading ROI, expected value, centering, and selling strategy — written for collectors who want the math behind the decision.
How to Calculate PSA Grading ROI Without Fooling Yourself
Most grading math leaves money on the table by ignoring probabilities and hidden fees. Here is the framework GradeYield uses, written out so you can run it by hand.
PSA 10 vs Raw: When Grading Actually Pencils Out
Not every card is worth grading. Here is the price-multiple, gem-rate, and condition logic experienced collectors use to filter submissions before they ever look at the math.
Expected Value, Plain English: How to Think About Any Grading Decision
Expected value is not Wall Street math — it is the most honest way to compare uncertain outcomes. Here is how to apply it to grading without dressing it up.
Where to Sell Graded Cards: Fees, Speed, and Who Each Platform Is For
Marketplace fees are not a footnote — a couple of percentage points decides whether grading wins. Here is how the major platforms compare and when each one fits.
How to Read the PSA Pop Report Without Lying to Yourself
PSA’s population data is free, public, and routinely misused. Here is how to pull realistic gem rates from it — and the selection-bias trap most collectors miss.
Vintage Card Grading: Why the Math Is Different (and Often Better)
Pre-1980 cards play by their own rules — lower gem rates, higher multiples, and more variance. Here is how to think about grading vintage without overpaying.
Put the math to work
Every article here is built on the same framework the calculator uses. Run your next grading decision through it.
Open the ROI calculator