Grade Return Calculator: A decision tool compares grading fees plus shipping against expected slab value to say whether a raw card is worth grading.

Pull comps for the 500 most-graded cards, model return probabilities per grade tier, and ship a free calculator that upsells a pro tier.

Why it can work: Grading costs 15 to 50 dollars per card, and most submissions lose money; a return calculator saves submitters real cash and earns trust that sells other tools.