One Piece Card Game / Booster Box
Legacy of the Master Booster Box EV Calculator
Estimate this physical product's no-chase expected value with a product-, region-, language-, and printing-specific model, then compare the modeled range with your entered cost. Estimated ROI is a planning metric, not a guaranteed return.
Model assumptions & evidence
Simulation order: complete product contents are drawn first. Included-pool controls and optional Sift are applied only after the draw, and filtered outcomes are never replaced or backfilled.
Model scope: Modeled configuration: 24 English boosters with 12 cards each, totaling 288 physical cards. Rarity and DON!! frequencies, slot placement and card allocation are documented assumptions rather than factory guarantees. DON!! counts can vary. The publisher confirms the roster and wrapper; the cited Japanese opening supports the DON!! identity without establishing full English pull rates. Complete draws precede Sift and pool filters.
- Release
- August 22, 2025
- Market scope
- en / North America / English North America booster box
- Default singles price
- TCGplayer Low
- Model basis
- Best Evidence — Japanese collation proxy
Included poolsChoose which already-drawn pools count toward EV.
Sealed Price / EV
Marketplace rows retain marketplace-only labels and use each marketplace's low sealed-product price.
| Marketplace | Product price | Break-even price | P/E | Basis |
|---|
Simulation Results
Low, Mid, and High are all derived from this same recalculated result set.
Confidence band: --
Modeled contribution mix
Card Value Breakdown
See which rarities and treatments are carrying the current gross EV.
Waiting for modeled rows
Model & EvidenceHow this calculation is supportedReview the product evidence, price coverage, and chase policy. EvidenceBest Evidence — Japanese collation proxyReviewed September 4, 2026 Historical Low-price reviewReviewed ordinary printing scopeHistorical Low coverage; current snapshot below Chase policyNo-chase baseline5 chase families excluded
Generated model: /data-static/one-piece/legacy-of-the-master/models/legacy-of-the-master-booster-box.json
Best Evidence — Japanese collation proxy
Evidence
This calculator is based on Best Evidence — Japanese collation proxy reviewed September 4, 2026.
Sources
- Legacy of the Master [OP-12] official English product page - Bandai Co., Ltd. (accessed 2026-09-03)
- TCGCSV category 68 group 24302, sealed product 628346 - TCGCSV (accessed 2026-09-03) — identity and pricing were imported into local generated artifacts; the calculator does not call the raw endpoint.
- Best Evidence — Japanese collation proxy and ordinary-pool classification - The Expected Value (accessed 2026-09-04)
- Japanese OP-12 six-card booster and set roster - Bandai Co., Ltd. (accessed 2026-09-04)
- OP-12 Japanese one-box opening, published 2025-06-14: three SR, one parallel and one DON!!; no full rarity ledger - Ice no Kakurega (accessed 2026-09-04)
- Double Pack Set Vol.8 separate DON!! bonus designs - Bandai Co., Ltd. (accessed 2026-09-04)
Limitations
- collation.cardsPerPack and collation.packsPerProduct: the product uses 12 cards per pack and 24 packs per English booster box; those physical wrapper counts do not establish rarity-slot probabilities.
- collation.caseStructure: box-level hit counts and display/case correlations are unresolved for the exact English North America printing.
- evidence.sample: null because no reviewed observation provides a complete, attributable sample with exact unit, size, method, North America printing, and observation interval.
- Modeling policy approved 2026-09-04: every supported ordinary card in the same slot, rarity, treatment, and finish pool receives one equal positive selection weight. This is a transparent modeling assumption where the publisher or empirical sample gives pool odds but not card-level sheet weights.
- Best Evidence — Japanese collation proxy: exact English wrapper and card-price identities are combined with an owner-approved Japanese-product collation proxy because a complete English rate ledger is not published. This is an estimate, not a factory guarantee.
- The English roster, exact printing identities, physical finishes, sealed product and generated Low-price snapshot are source-bound inputs. OP-12 rarity marginals and synthetic slot placement remain explicit assumptions; the cited Japanese opening does not establish a complete rarity ledger or English factory guarantee. Manufacturer printing wave remains unspecified.
- The proxy is first-order and product-family-specific. No display or case correlation is inherited, and no target is used as a donor for another target.
- The September 4, 2026 source review established the retained exact English printings using its Low-price evidence. Within each retained rarity/treatment pool, the model uses equal positive weights where sheet weights are unavailable; current missing quotes remain unknown and do not change those memberships or probabilities.
- OP-12 assumption-only box marginals: 166 Common, 72 Uncommon, 39 Rare, 4 Leader, 4 Super Rare, 1 regular Secret Rare, and 2 booster DON!! cards total 288 physical cards. No complete OP-12 Japanese or English rarity ledger was found; the game-card rarity mix remains the program's generic assumption and must not be read as measured OP-12 pull rates.
- Replace this proxy when a complete, attributable English collation ledger or publisher rate table becomes available for the exact release.
- Bandai's English OP-12 roster contains 119 ordinary identities: 45 Common, 30 Uncommon, 26 Rare, 6 Leader, 10 Super Rare, and 2 Secret Rare. The six Special cards, two 3rd Anniversary Special cards, one Treasure Rare, and one booster DON!! are distinct roster categories; checklist counts do not establish pull rates.
- The directly attributable Japanese OP-12 opening published 2025-06-14 shows three regular Super Rares, one Vinsmoke Reiju parallel, and one Rayleigh DON!!, but omits ordinary rarity totals, pack positions, printing wave, and opening interval. It supports the booster DON!! identity, not a full OP-12 rate ledger or an English box guarantee. Scaling its one observed DON!! to two expected English DON!! cards is an explicit assumption.
- Exact English booster DON!! product 646574 uses its Foil TCGplayer Low price. Double Pack Set Vol.8 DON!! products 651174 and 651175 are separate DP-08 bonus cards and are excluded. Illustration Box promotional cards and other purchase or tournament promotions are not booster-box contents; no box topper or external bonus is added.
- No reviewed OP-12 source establishes a thirteenth card in English DON!! packs or the replaced rarity. The two expected DON!! outcomes replace two assumed Common positions, keeping the advertised 24 twelve-card packs at 288 physical cards. Retained game-card rarity marginals and regular Secret Rare normalization are unresolved assumptions; another set's observations are not evidence for OP-12 rates.
- Each synthetic twelve-card pack has seven Common-or-DON!! positions weighted 83/84 Common and 1/84 DON!!, three Uncommons, one guaranteed Rare, and one independent upgrade weighted 15/24 Rare, 4/24 Leader, 4/24 Super Rare, and 1/24 regular Secret Rare. Slot assignment is an explicit modeling assumption. These independent draws preserve expected marginals, not guaranteed box counts, duplicate restrictions or seeded case patterns. Embedded pack EV uses the same per-pack expected weights, including 2/24 expected DON!! cards; packs are simulated independently from boxes, so finite-run bands need not equal box bands divided by 24. Draw the complete 288-card product before applying Sift or user filters; filtering never backfills the completed draw.
- All unsupported alternate arts, manga, Special cards, 3rd Anniversary silver/gold cards, Treasure Rare and external promotional variants are absent before drawing. Regular-art Jewelry Bonney OP12-118 and Bartholomew Kuma OP12-119 Secret Rares remain eligible at equal positive weights within their exact English rarity/treatment pool.
- No-chase redraw policy approved 2026-09-04: Curio, Enchanted, alternate-art, parallel, showcase, serialized, signature, premium-rarity, promotional, and any other card or treatment without a supported pull rate are excluded. A chase hit is redrawn from the applicable supported ordinary pool, so excluded cards occupy no modeled outcome.
- Simulation ordering is draw the complete disclosed no-chase product first, record that draw, and only then apply Sift or another user filter. Sift never changes or backfills the completed modeled draw.
Local price snapshots
Low snapshot coverage (historical source review)
The historical Low-price coverage below describes the original source review, not current Market availability. Missing selected-source prices remain unknown; current coverage is checked from the loaded generated snapshot.
TCGplayer Low is the default singles price for the first calculation and remains selected until changed. Resetting the price source returns to TCGplayer Low.
- Row coverage (reviewed)
- 100.0%
- Modeled mass coverage (reviewed)
- 100.0%
- Coverage observed
- September 4, 2026
- Low-price source
- Available Via Tcgcsv
No catalog-level price fallbacks are recorded. Runtime gaps are disclosed below when data loads.
TCGplayer Low coverage will be checked against the loaded local price snapshot.
Generated model and price snapshot dates load with this calculator.
No-chase model
Chase Exclusions
Excluded chase families are removed from the model entirely. They are never retained as zero-EV occupied outcomes. Each affected physical position is instead filled from its disclosed supported ordinary pool before the product draw is completed.
- Alternate-art, parallel, and promotional cards
- Separate-product Double Pack DON!! cards
- Showcase, serialized, signature, and hyperspace cards
- Special and 3rd Anniversary cards
- Treasure Rare cards
Product snapshot
Modeled Product Structure
- Cards per pack
- 12
- Packs per booster box
- 24
- Draw order
- Complete draw, then filters
All modeled slots are resolved before pool toggles or Sift score the opened product. This ordering prevents replacement draws from inflating EV.
Pack & Booster Box EV
| Metric | Low | Mid | High |
|---|---|---|---|
| Pack EV (gross) | $0.00 | $0.00 | $0.00 |
| Booster Box EV × 24 packs (gross) | $0.00 | $0.00 | $0.00 |
| Seller fees | $0.00 | $0.00 | $0.00 |
| Net after fees | $0.00 | $0.00 | $0.00 |
| Profit after purchase | $0.00 | $0.00 | $0.00 |
| Break-even price (Mid) | $0.00 | ||
Purchase EV & Estimated ROI
| Metric | Low | Mid | High |
|---|---|---|---|
| Gross EV | $0.00 | $0.00 | $0.00 |
| Total fees | $0.00 | $0.00 | $0.00 |
| Net after fees | $0.00 | $0.00 | $0.00 |
| Profit after expenses | $0.00 | $0.00 | $0.00 |
| Modeled ROI vs entered cost | -- | -- | -- |
booster boxes: 0 · Price/booster box: $0.00 · Total cost: $0.00
How is estimated ROI calculated? It equals modeled profit divided by the entered product cost. Modeled profit subtracts that product cost, selected seller fees, and any entered order or shipping costs from the modeled resale value. It is not a guaranteed return; pull variance, market price changes, taxes, and other unmodeled selling costs can change actual resale results.
Expected contribution
Card Value Breakdown
| Name | Set | Card # | Rarity | Treatment | Value | Seller fees | Products / copy |
|---|---|---|---|---|---|---|---|
| Expected cards/booster box after toggles and Sift | 0.00 | ||||||
| All modeled game-card rows | 0.00 | ||||||
| Gap to modeled card total | 0.00 | ||||||
The simulator draws the full physical product first, then applies disabled pools and optional Sift. Filtered outcomes occupy their actual slots and are never backfilled.