Big Mama icon, Mythical rarity item in Grand Piece Online

Big Mama BM

Unranked Mythical High demand Medium confidence

Current trading value

6.5K

Range 5.6K–7.5K

Window48h

UpdatedSep 10, 2026

Trades381
Offered148
Wanted233
Demand ×1.57

In stock from us

trade value per $1

Buy on PetMart

PetMart is our shop

Big Mama isn’t in stock. Tori trades near it6.4K, $3.79. PetMart is our shop

What Big Mama's value means

At 6.5K value units, Big Mama trades for roughly 0.65× a Mythical Fruit Chest (the 10,000-unit reference item), so it sits below the anchor on the chart.

That figure is a medium-confidence read: the solver places the true value between 5.6K and 7.5K (a ±15% band) off 381 observed Discord trades.

Over the last week the value has been holding roughly flat versus its 30-day average (-1.6%).

In trade chats and value lists, Big Mama is also written BM.

Demand is currently rated High and rarity is Mythical, both recomputed every solver run.

Price history · 60 days

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

+100.1% / 60d
6,531

Recent Big Mama trades

The exact offers our pipeline parsed from Discord. No edits, no opinions.

  • Pika Big Mama seen 20×
  • Big Mama Big Mama seen 14×
  • Big Mama Big Mama seen 14×

Most common trade shapes observed for Big Mama, from 63 solo-trade samples.

Trade recommendations

Auto-built from the value-matches graph. Verdicts use the same win/fair/lose math as the calculator.

WIN

Big Mama for Tori (6.4K)

Big Mama's value tops Tori. Clean win on paper.

+2.5% in your favor

WIN

Big Mama for Kaido Set (6K)

Big Mama's value tops Kaido Set. Clean win on paper.

+8% in your favor

WIN

Big Mama for Blo's Sledgehammer (6K)

Big Mama's value tops Blo's Sledgehammer. Clean win on paper.

+9% in your favor

Flips with Big Mama

See all flips →

Trades that read fair to the other player but leave you ahead.

    Big Mama for Pika, you gain +16% +16%

Compare Big Mama

All comparisons →
Browse all GPO values →

FAQ

How much is Big Mama worth in GPO?

Big Mama's current trading value is approximately 6.5K (range 5.6K-7.5K), based on 381 observed Discord trades over the last solver run. Updated 2026-09-10.

Is Big Mama's value rising or falling?

Right now it's roughly flat: the 7-day value is -1.6% against its 30-day average, so no strong move either way.

How is Big Mama's value calculated?

Big Mama's value is derived purely from observed Discord trade messages using a ratio-chain solver against the Mythical Fruit Chest anchor (10,000 value units). 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.