The MTG market terminal
SpellBook prices 90,000+ printings from real completed sales, ranks every booster box by EV, catches buyouts while they are happening, and runs seller inventory across four marketplaces. The spreadsheet retires today.
Already a seller? See the seller toolkit →
Market Value
$2,124
Cost Basis
$1,672
Unrealized P&L
+$452
+27%
vs S&P 500
+16%
outperforming
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Live from the market
Live data, not screenshots. These panels update all day from the same feeds the full tools run on.
Pick your lane
Collectors and investors
Sealed buyers
Sellers
The flywheel
Every surface feeds the next: the rankings price the box, the deal board finds it cheap, your portfolio carries it at what you actually paid, alerts time the exit, and the sell math protects the proceeds. Every step below is live software, not roadmap.
Day 0 · 8:12 AM
SpellBook crawls hundreds of storefronts and ranks every listing against the box's crack value. This Bloomburrow Collector Box shows up at $195 from a vetted store while the market sits at $222, so the discount lands on top of a box that was already worth opening.
Day 0 · 8:15 AM
The box page shows how the number is built: published pull odds times card-level prices, with full, land-adjusted, and vendor-floor EV side by side so the exit assumption is visible. Backtests against real openings keep the model honest.
Day 1
What you paid is the basis, not a guess. From here the box is priced daily from 17+ sources, so unrealized P&L stays honest while you decide whether it ever gets cracked.
Day 152 · 7:40 AM
The set rotates out of print and sealed starts climbing. You are not refreshing price pages to notice; the alert on the box you own fires while the move is still happening.
Day 180
The same $289 sticker nets a different number on every venue once fees and shipping come out. The sell math runs it everywhere you could list, so the decision is a comparison, not a guess.
It ends where sellers begin
The free scanner books every single at real cost basis, one publish lists them across four marketplaces, and a sale anywhere delists the siblings everywhere. Same data, store scale.
See the seller flywheel90,000+
Unique card printings tracked
500+
Sets and expansions covered
17+
Price sources aggregated daily
10
Buylist vendors compared
17+ data sources. One MTG finance workflow.
Paste your card list or drop a CSV in any format. SpellBook maps the columns, tracks value, and keeps cost basis ready for sell decisions.
Prices, EV, alerts, and seller sync in one terminal. Free to start, no credit card, no spreadsheet required.
Start Tracking FreeExpected value (EV) estimates the average dollar value of cards you'd pull from a sealed booster box. SpellBook Finance calculates EV for every in-print set using live TCGPlayer pricing, broken down by rarity and treatment.
SpellBook builds EV from the published pull odds and card-level prices, then shows full, land-adjusted, and vendor-floor EV so the exit assumption behind each number is visible. We validated the model against a real Foundations opening cohort, which landed within 10% of modeled EV. Read the Foundations EV backtest.
SpellBook Finance is an MTG finance command center for tracking collection value, analyzing sealed EV, comparing sell venues, and reconciling inventory after it moves.
Yes. SpellBook Finance lets you overlay portfolio returns against a market benchmark so you can see whether your cards are outperforming traditional investments.
SpellBook Finance offers free portfolio tracking, card prices, sealed EV rankings, box backtests, and price history. Premium adds higher alert headroom, automated inventory listing, and a sealed deal board that ranks live box discounts by EV.