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Tier B+ Mythical Demand · Low Reliable
Roger's Ace icon — Mythical rarity item in Grand Piece Online

Roger's Ace ACE

Ace In-Game Aura Rarity Mythical Dropped by Roger Drop Chance 0.5% Location Umi Island Trade Level 475+ Stats Base DMG 6

Price history · 46 days

Per-day median across observed trades. Last point is today's solver run.

+24.9% / 46d
CI mid
45d ago33d22d11dtoday

Trade recommendations

Auto-built from the value-matches graph. Verdicts use the same Win/Fair/Lose math as the calculator.

FAIR
Roger's Ace for Endbringer Armor (3.5K)
Within 2% — a clean even swap.
-1.6% delta
WIN
Roger's Ace for Flamingo Boat (3.4K)
Roger's Ace's value tops Flamingo Boat — clean win on paper.
+2.9% in your favor
WIN
Roger's Ace for Ope (3.3K)
Roger's Ace's value tops Ope — clean win on paper.
+4.2% in your favor
Browse all →

FAQ

What is Roger's Ace worth in GPO?

Roger's Ace's current trading value is approximately 3.5K (range 3.1K–3.8K), based on 2,488 observed Discord trades over the last solver run. Updated 2026-06-02.

How is the value calculated?

Values are derived from observed Discord trade messages using a ratio-chain solver against the anchor item. No editor opinions, no hand-tuned numbers. See /legal/methodology for the full math.

Why is the value a range, not one number?

The range is a 90% confidence band. The single headline number is the median; the band shows where the solver thinks the true value lives given noise.

Is Roger's Ace's demand Low forever?

No. Demand is recomputed every solver run from the offered:wanted ratio in trade messages. Roger's Ace's current ratio is 0.34 (637 wanted vs 1,851 offered) — that's why demand is Low right now.