Secret Lair EV Calculator — Sealed vs Singles

Use this calculator to decide whether a Magic: The Gathering Secret Lair drop is worth breaking open for singles or better sold sealed. All prices update daily from TCGplayer market data.

Select any combination of Secret Lair drops to compare sealed sale versus opened singles market value. Singles pricing pulls live from TCGCSV (with Scryfall fallback) alongside sealed drop values sourced from TCGCSV when mapped (otherwise MTGStocks). Adjust the marketplace fee assumption to see how sealed drop sales compare to cracking and selling singles. The recommendation favors selling sealed unless opened singles clear your break-open buffer after fees and handling assumptions. Each run fetches the most recent pricing, so expect a short wait when loading many drops at once.

Note: This tool runs slowly when you compare many drops at once. If you run into issues, try comparing fewer drops at one time.

1. Choose Secret Lairs

Listing MTGJSON Secret Lair drop variants with TCGCSV/Scryfall pricing. Universes Within and Ultimate Edition entries are included.

2. Decision Assumptions

Fees apply to both paths. The break-open buffer and handling cost only apply to the singles path, so the page recommends opening only when singles are meaningfully ahead.
Loading MTGJSON drop catalog…