This box trades at $853 — right at its 1-year high. Price has been broadly stable across the last quarter. That puts it in the upper part of its tracked range. It typically swings about ±1.0% in a month — calm by One Piece box standards, so moves that size are worth noticing.
eBay supply is tightening: active listings are down 19% over the last 60 days (~34 live now). The set's cards are worth about $3,918 — 4.6× the box price, vs a typical 12.8× for One Piece. That thin multiple trims 1 point off the score. Across One Piece boxes the median 30-day move is +1.9% (89% of boxes up), and this one is running 0.3 points behind that pace.
Supply is tightening, but the box sits within 5% of its 1-year high — little room left to run, so it's held at WATCH. A pullback below roughly $810 — or a decisive break to new highs — reopens the buy case.