Is One Piece OP-17 The World's Strongest Warriors worth opening?

Verdict

On average a box returns well under what it costs. As of mid-September 2026 The World's Strongest Warriors Booster Box, from the newest English main set of the One Piece Card Game, sells for about $334 on TCGplayer. The site's "all tiers" expected value (EV), the long-run average over many boxes, is about $125. About 50 percent of that average comes from case hits, rare printings that most boxes in a 12-box case do not contain, so the "no case hit" EV, the average of the boxes without one, is about $62, and a single box is often lower still. Every pull rate behind these figures is a community estimate, and the model leaves out the set's most valuable card.

What OP-17 is

The World's Strongest Warriors (OP-17) went on sale in English on August 28, 2026, about a week after the Japanese release on August 22. An English box holds 24 packs of 12 cards as sold by retailers, and a case is 12 boxes. Japanese boxes are a different product.

TCGplayer lists 179 cards on the OP-17 set page, 177 of them priced. Base printings account for 119: 45 commons, 30 uncommons, 26 Rares, 10 Super Rares, 2 Secret Rares and 6 leaders, the cards decks are built around. The other 60 are special printings:

• 25 Alternate Arts (also called parallels), 6 of them leaders: the same card number, rules text and stats with new artwork.
• 3 Super Alternate Arts, a rarer tier above Alternate Art.
• 11 SP cards: special-treatment versions, usually of cards from other sets, keeping their original numbers.
• 4 manga rares, with artwork from manga panels.
• 1 Treasure Rare, a rare special printing: one card in each recent English main set.
• 10 DON!! cards, the game's resource cards, 3 of them gold.
• 6 Pandaman Art cards.

The median card is about 20 cents. Of the priced cards, 44 are at $10 or more, 19 at $50 or more and 14 at $100 or more.

The most valuable cards

As of mid-September 2026 the most valuable card is Monkey.D.Luffy (079) (Super Leader Alternate Art) at about $1,790. The four manga rares follow, from Shanks (022) (Manga) at about $1,500 to Charlotte Linlin (112) (Manga) at about $825. The top SP card, Monkey.D.Luffy (ST31-004) (SP), is about $815.

All 14 cards at $100 or more are Super Alternate Art, manga rare or SP printings. The top Alternate Art that is not a leader is about $65, and the 10 base Super Rares average about $2.10.

Sealed products and price per pack

TCGplayer lists seven sealed products. Price per pack as of mid-September 2026, lowest first:

• Booster pack: about $9.80.
• Sleeved booster pack: about $14.
• Booster box, 24 packs as sold by retailers, about $334: about $14.
• Sleeved Booster Pack Art Bundle, set of 4, about $65: about $16.
• Double Pack Set Vol. 12, 2 packs for about $40: about $20.

The booster box case, about $4,010 for 12 boxes, and the Double Pack Set Vol. 12 Display, about $374, have no pack count in the site's data and show a market price with no EV.

Bandai's OP-13 page gives $4.99 per pack, and the site uses that figure for OP-17. Bandai publishes no box MSRP; a retailer box of 24 packs at $4.99 comes to $119.76.

Box EV: two figures and a range

EV is what a product's cards would fetch on average at current TCGplayer market prices. For the box:

• All tiers: about $125, about 37 cents per dollar of box price. This is the long-run average over many boxes.
• No case hit: about $62, about 19 cents per dollar. This is the average of boxes with no SP card, manga rare, Treasure Rare or gold DON!! card, which is most boxes. A single box is often lower still: on the estimates below, about half have no Secret Rare.
• Range: about $82 to about $163 on all tiers, from the low and high ends of the rate estimates.

Case hits, which most boxes do not contain, lift the average: they are about 50 percent of it. Per box, SP cards add about $34, manga rares about $24, the Treasure Rare about $3.80 and gold DON!! cards about $1.10. The rest is mostly Alternate Arts (about $24, plus about $10 for leaders), Super Rares (about $15) and Secret Rares (about $11).

The model leaves out Super Alternate Art cards (leaders included), gold, silver and wanted-poster SP variants, special-foil and alternate-art DON!! cards and anniversary cards, because no English pull rate exists for them. That includes the set's most valuable card, so the true average is somewhat higher than shown. Commons, uncommons, base leaders and Rares are in no total, because bulk is hard to sell.

This is information, not financial advice. Opening sealed product is a gamble with a skewed payout, and buying singles is the cheaper way to get a specific card.

Pull-rate estimates and their confidence

Bandai publishes no pull rates. Every rate here is a community estimate from box and case openings of English boxes, and the site grades each for confidence.

Medium confidence:

• Super Rare: about 7 per English box in community counts (6 to 8). Guides quoting 3 to 5 describe Japanese boxes.
• Alternate Art, not a leader: about 1.33 per box (1 to 1.67).
• Alternate Art leader: about 0.33 per box (0.25 to 0.33), so about two boxes in three have none.
• SP card: about 2 per case (0.083 to 0.167 per box); one counted OP-16 case had 5.

Low confidence:

• Secret Rare: about 1 in 2 boxes (0.33 to 0.67), not the often repeated one per box.
• Pandaman Art: about 0.58 per box (0.5 to 0.67), single source.
• Treasure Rare: about 1 per case at most (0 to 0.083 per box).
• Gold DON!! card: about 1 per case (0.083 to 0.167 per box), single source.
• Manga rare: about 1 per 4 cases (0.014 to 0.042 per box), with no counted sample.

The largest English sample found is about three OP-17 cases, more than 1,000 packs, from one guide site that does not name the openers. A tier's rate is shared by every card in it, so a named card is harder to pull than its tier.

How OP-17 compares with other modelled boxes

The site models 12 English main-set boxes, OP-06 to OP-17.

As of mid-September 2026 OP-17 is third by all-tiers EV per dollar, at about 0.37 (about 0.19 with no case hit). Adventure on Kami's Island (OP15-EB04) leads at about 0.56 (0.30): a box is about $255, with about $144 on all tiers and about $77 with no case hit. The previous main set, The Time of Battle (OP16), is second at about 0.38 (0.20), with a box at about $231.

OP-17's no-case-hit EV of about $62 is the second highest in dollars, but its ratio is fifth, because the four boxes ahead of it all cost less. No modelled box has an all-tiers EV above its market price.

Bottom line for specific cards

Shanks (022) (Manga) is about $1,500 as a single. On community estimates a manga rare, any of the four, turns up about once in four cases (sources range from one in two cases to one in six), and four cases come to about $16,000. The Super Leader Alternate Art Luffy has no pull-rate estimate, so its odds are not known.

The buttons above open eBay searches for the box and the pack, filtered below the TCGplayer market price. They are affiliate links. OP-17 is about three weeks old and prices move daily.

How we got these numbers

Prices are US TCGplayer market prices (an average of recent sales, English, Near Mint) from the daily feed. Pull rates are community estimates for English boxes, last reviewed on September 19, 2026, drawn mainly from the tcgtalk OP-17 case data, one itemised OP-16 case, guides from onepiecepacksimulator and slab-z, and a structural model whose author calls its figures approximations. Not modelled: Super Alternate Art cards, gold, silver and wanted-poster SP variants, special-foil and alternate-art DON!! cards, anniversary cards and bulk. The full method is on the methodology page.