Quick fill

Pick a key and a condition — the table fills itself. Then tweak anything.

Start from a key

Raw condition

Key values are rough starter estimates, and grade values are curved from the Beckett 9.8 anchor. Replace them with your own sold comps before trusting the verdict — the tool is only as honest as its inputs.

The book

What it costs you to get a slab in hand.

Raw cost

Grading + ship

Sell fee

The grade odds

Your read on how it grades, and the sold-comp value at each grade.

GradeChanceValue

Probabilities total100%

The verdict

—

Expected graded value

—

probability-weighted, before fees

Expected net profit

—

after fees & all costs

Expected ROI

—

on total cash in

Chance of profit

—

break-even at —

Profit by grade outcome

How to fill this in honestly Grade odds: base them on the raw copy in front of you and Beckett population data — not optimism. Values: use real sold comps (130point, PriceCharting, Heritage) at each grade, not asking prices. The trap: a positive EV carried entirely by a low-odds 9.8 is a gamble, not an edge — watch the "chance of profit," not just the average. When the value gap between grades is small, don't grade.

How this data was collected

This is a calculator, not a dataset: the verdict is computed live from the numbers you enter, and it is only as honest as those numbers. Nothing is sent anywhere, the math runs entirely in your browser.

The optional starter values behind the "start from a key" presets carry source stamps so you know what you're leaning on:

Community-reported Preset raw prices and 9.8 anchors are rough figures drawn from public sold listings and collector consensus. They move constantly. Replace them with your own sold comps (130Point, PriceCharting, Heritage) before trusting a verdict.

Estimated Values at grades below 9.8 are curved from the 9.8 anchor using a standard grade-to-grade ratio, not individually sourced. The "curve" button applies it; overwrite any cell with a real comp when you have one.

Your call Grade probabilities are yours to set. The tool deliberately ships them empty of optimism: base them on the copy in front of you and Beckett/CBCS population data, not hope.

Community-reported public listings / collector consensus, not independently confirmed. Estimated derived by formula from an anchor, not individually sourced. Your call an input you supply; the model won't guess it for you.

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