Independent research on sealed Magic.

Who publishes Booster Bullpen, where its sealed Magic pricing comes from, how often it updates, the editorial principles behind the scores, and how to report an error.

What it is

Booster Bullpen is an independent research tool for sealed Magic: The Gathering. It collects publicly available pricing for sealed products, applies one published scoring method to all of them, and shows the result: a Bullpen Score, an entry signal, a Buy Below target derived from fair value, and 30- and 90-day movement. It is a reference, not a shop: it sells nothing, holds no inventory and takes no position in any product it covers.

Why it exists

Sealed prices are scattered across marketplaces and move every day. Booster Bullpen reads that market with one method rather than many opinions: the same rules for every product, the same published snapshot for every visitor, and the method documented before it is applied. It describes what the market has done, not what it will do.

How the numbers are made

Every figure is read from a published daily snapshot — the same snapshot for every visitor — rather than computed live. Deterministic rules turn that snapshot into a score, a signal, a Fair Value and a Buy Below target; AI may explain a result but never sets one. The full data-source registry and update cadence are documented on the methodology page. Where a product has too little pricing history to score honestly, the score is left blank rather than estimated.

Who builds it

It is built and run by one person, with no team, no institutional backing and no partnership, sponsorship or data agreement with Wizards of the Coast, any marketplace or any retailer. Some outbound product links are affiliate links, disclosed in the privacy policy; they never influence a score or a signal.

Corrections and risk

Errors can be reported by email; data errors are corrected on the next daily snapshot, and changes to the scoring method itself are logged in the methodology changelog. Nothing here is financial advice. Sealed product is an illiquid collectible whose value can fall as well as rise, and a Buy Below target is a fair-value reference point, not a prediction. See the terms of service.