Unforeseen Incident (Store Tournament Winner Pack 01) from Gundam Promotional Cards fell $22.18 to $137.80 on Oct 21, 2026, the biggest one-day dollar move among Gundam singles, per TickerMint.
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Source: TickerMint (tickermint.cards), Oct 21, 2026. https://tickermint.cards/wire/2026-10-21-gundam-dollar-move