$292

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Booster box · One Piece

The World's Strongest Warriors

Just got this in

The Prof’s take

The World's Strongest Warriors just came out, and a new set's price bounces around while the first wave sells through. I'll give it a rating once things settle.

— the Prof

Open it or keep it sealed?

Open it. For the price, the cards inside are a better deal than usual for One Piece.

Set value$16,353

Box price$292

Show me the numbers

Price since we started tracking it

Market price, in dollars.

Forecast bands are Pro. Where I expect the price over the next two months, drawn right on this chart.

See the back room

Price today$292

1-year high$439

Last 90 daysDown 15.7%

Last 30 daysDown 6.3%

This weekAbout flat

eBay listings~366 live, up 731.8% in 60 days

Set value$16,353, 55.9× the box (typical One Piece 18.6×)

Vs. retail2.4× the ~$120 original price

Data confidenceB

eBay listings over time

How many are for sale. Fewer usually means harder to find.

The long version

This box trades at $292, 33% below its 1-year high of $439. It's been sliding: down 15.7% over 90 days and still soft. That leaves it near the bottom of its tracked range. It typically swings about ±28.8% in a month, jumpy for a One Piece box, so single-digit dips here are mostly noise. Worst tracked stretch: a 34% drawdown from peak; it sits 33% below that peak now.

eBay supply is growing: active listings are up 732% over the last 60 days, more sellers than buyers for now. The set's cards are worth about $16,353, 55.9× the box price, vs a typical 18.6× for One Piece. Across One Piece boxes the median 30-day move is -1.8% (29% of boxes up), and this one is running 4.5 points behind that pace.

This set released 2026-08-28, 45 days ago. Launch allocation is still selling through, so a contracting listing count is ordinary retail behavior rather than a squeeze, the same reason singles and ETBs hold new sets back. Ratings unlock at 90 days old, 45 days from now.

What this is based on: moderate price history (41 reads / 95 days), 23 supply reads.