The value engine: 1,000,000+ cards, honest by design
Everything in Slabline sits on one foundation: a catalog of more than one million graded cards across sports, Pokémon, Magic, Yu-Gi-Oh, One Piece, Lorcana, VeeFriends, Marvel, F1 and more — priced from real comparable sales, with hundreds of millions of dollars of recorded transactions behind the numbers.
Two honesty rules make the numbers trustworthy. First, recorded sales referee the price guides: when a guide and actual sales disagree, the sale wins, and the page says so. Second, when a card has never publicly traded, Slabline shows a clearly labeled estimate from its set’s grade curve instead of a fake precise number — and replaces it with a real price the moment one exists.
Every card page also shows the every-grader observed-sales matrix — what the same card actually sold for as a PSA, BGS, SGC or CGC slab, grade by grade. Not a fixed multiplier: real observed prices, per company.
Ask Slabline AI: a card expert on every page
Every card page carries Ask Slabline — an AI that answers questions about that exact card from that card’s own data: last sale, liquidity, which grader pays the most, how the category has moved. It cannot invent numbers; when the data does not exist it says so.
Ask it “which grader pays the most for this card?” on an iconic card and it will answer from the observed matrix — on the 1986 Fleer Jordan, that answer is PSA 10 at $414,800, with SGC second. Free, fifteen questions a day, on every card page and in the app.
Live Scan and the voice in your ear
Point your phone at a show table and Live Scan identifies card after card — raw or slabbed — with live values, gem rates, and cert verification. Turn on voice and Slabline’s hobby-guy callouts read each card aloud as it lands: what it is, what it’s worth, how rare the grade is. Phone at chest height, eyes on the table, values in your ear.
The same voice runs the add-to-collection review: each scanned slab is announced as you confirm it, and a stack of scans can be added with one tap — “All nine in the collection — updating your Slabline Score.”
Pre-Grade: know the grade before you pay for it
Photograph a raw card and Pre-Grade predicts the grade it would likely receive, shows the card’s real gem rate from population data, and runs the grading-ROI math — expected graded value minus raw value minus fees — so you know whether the submission is worth it before a grader has your money. A centering analyzer measures the borders that decide most 9-versus-10 calls.
Trade Check and Slab Pack EV: the deal-protection tools
Trade Check prices both sides of a card trade per cert from real comps, applies a liquidity haircut to the slow side, and returns the one number that settles negotiations: cash to even — with a shareable link so the other collector sees the same math. No other tool in the hobby does this.
Slab Pack EV does the same for repacks: the real expected value of every major slab-pack tier — Packz, Arena Club, GameStop, Courtyard, Fanatics and more — priced from independent comps rather than the house’s own numbers, next to each platform’s published odds, floors and buyback terms.
Market intelligence: indexes, sales boards, and Today
Slabline maintains market indexes the way finance does: the SL50 flagship index, category indexes for every sport and TCG, player and character indexes, and rookie indexes — with up to four years of daily history behind the charts. Every card page links its player and category index so a single card’s move has context.
The Sales Board tracks the biggest recorded sales, the fastest risers and fallers, and daily sales volume across the market. The Today page condenses it into one screen: index moves, the day’s biggest sales, hot and cold cards, the most-traded sets, and hobby headlines.
The protection layer nobody else has
Slabline’s deepest moat is insurance-grade protection. The Slabline Score — a 0–1000, credit-score-style index — measures how protected a collection is across insurance, concentration, storage, liquidity and provenance. The evidence vault holds photos, receipts and appraisals per card. And the schedule generator produces a cited, appraisal-grade insurance schedule — every line item backed by comparable-sale evidence an underwriter can verify — plus a claim-readiness score and an underwriting risk profile.
A spreadsheet tells you what you own. Slabline produces the documents that get a claim paid.
Collection ops: from shoebox to portfolio
Add cards by scanning the slab, typing a cert, importing a CSV from Card Ladder or an eBay purchase history, or Live Scanning a stack. Values re-price from live comps, price-move alerts email you when a card moves, the weekly portfolio email recaps your holdings, and the performance view benchmarks your collection against the SL50 and your category’s index — with cost-basis profit and loss if you record what you paid.
Selling instead? List a card on eBay straight from your collection — prefilled title, photo and price — or run the sell/hold/regrade decision engine on any slab.
