Slabline™
Graded-card protection score
Enter a cert number — instant, comp-backed value. Free, no account.
Tracking$18.3B+in graded-card market value across 322,000+ cardshow it's countedThen the part trackers can’t do: manage the whole collection like a portfolio. Track value and performance, manage risk, and see one 0–1000 Score — worth, grading upside, and protection in a single number.
Bring the whole collection in at once — a CSV from eBay, Whatnot, Card Ladder, Market Movers, Mascot, or your own spreadsheet.
Track values. Show charts. Compare comps. They tell you what a card is worth.
Tells you what to do with it — what it would grade at each company, whether grading pays off, what you’d actually recover, and what’s at risk in one 0–1000 Score.
PSA · BGS · SGC · CGC judge differently. See the grade each is likely to give from the card’s own centering, corners, edges and surface — and which one nets the most at that grade.
Real gem-rate odds × the value ladder − fees = your expected grading profit, in actual dollars.
Market value vs. a dealer’s quick-sale offer — the liquidity gap, and why insuring at market matters.
Your raw cards ranked by expected profit — grade the ones that pay off first.
Every answer is built from real comparable sales, gem rate & population, and dealer spreads — across PSA, BGS, SGC & CGC. No other tool puts them together.
Free up to 25 cards · paid plans from $9.99/mo · See plans
