Grookey McDonald's Collection 2021 Market Report

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Grookey price and historyThe live card page: price, chart and graded ladder.All McDonald's Collection 2021 pricesEvery card in the set, priced off the same tape.McDonald's Collection 2021 set reportHow the whole set has moved and what leads it.Cards illustrated by kirisAkiEverything this illustrator has drawn, with prices.This week's biggest moversThe widest recorded moves across the catalog.All market reportsEvery card and set we publish a dossier on.How our calls scoredThe public ledger of every call, win or lose.Every Pokémon setThe full set index, oldest to newest.

Other Grookey cards

What stands out

PSA population larger than 98% of its price band ($0.25 to $0.50).

Reference class: its price band ($0.25 to $0.50). Percentiles are recomputed nightly, by disclosed rule, from recorded data across every tracked card.

01The verdict block2 readings

What the fixed formulas say about the figures below, with the arithmetic shown.

Assay

Context2

Each stamp is one fixed formula applied identically to every card. Supportive and caution mark a reading that cuts the same way for anyone holding the card. Context marks a fact that is good news to a buyer and bad news to a holder, so the desk does not pick a side.

Registry inflowContext

EFFECTIVELY CLOSED

New slabs a week against the recorded PSA population.

Printing rankContext

CHEAPEST PRINTING

This printing's raw price against every tracked printing of the Pokémon.

Every verdict is a disclosed formula over recorded data, applied with the same fixed thresholds to every card. No discretionary price forecasting is used, and the arithmetic is printed so it can be reproduced.

moonstone Pro

The full Grookey dossier is sealed

Pro breaks the seal on our call: a stamped buy, hold, or sell and a fair value on every rated card, each a disclosed formula over recorded data. Below is every section this dossier is holding back.

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What this dossier is holding2 sealed sections

02
The call
The rating was refused on this card November 2, 2026 and the refusal states its reason; members read why in full.
03
The registry
8 daily PSA population snapshots on file, 49 days of continuous history, drawn as a growth curve.

See a full report, freeMew exPaldean Fates · open to everyone, nothing sealed

Grookey McDonald's Collection 2021 Market Report