What stands out

Gems easier than 94% of Delta Species.

Reference class: its set (Delta Species). Percentiles are recomputed nightly, by disclosed rule, from recorded data across every tracked card.

01The verdict block3 readings

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

Our reading

Caution1Context2

Each verdict 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 we do not pick a side.

How often PSA 10s sellCaution

PSA 10s rarely sell

Verified PSA 10 sales a week, from our daily graded sales records.

New PSA copiesContext

Almost no new PSA copies

New PSA-graded copies a week, against the number PSA has graded so far.

Printing rankContext

The 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 Koffing dossier is sealed

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

Unlock every report · 3 days free

3 days free, then $9.99 a month. Cancel any time before the free days end and you are not charged. Payments are handled by Stripe.

What this dossier is holding6 sealed sections

02
The call
The rating was refused on this card November 14, 2026 and the refusal states its reason; members read why in full.
03
Recorded sales · verified sold medians
1 grades carry a verified sold median on this card, each with its sample size. Sales through November 8, 2026.
04
The registry
10 daily PSA population snapshots on file, 63 days of continuous history, drawn as a growth curve.
05
Sales per week
4 grades carry a measured weekly sale rate, each over its own 61 day window.
06
Market sentiment
This card has a non-holo finish; we rank how that finish and this Pokémon are doing against every other.
07
The comparables
5 comparable cards across 2 reference sets, every row linked to its own dossier.

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

Unlock every report · 3 days free Sign in

3 days free, then $9.99 a month. Cancel any time before the free days end and you are not charged. Payments are handled by Stripe.

Pro also includes 300 Cynthia questions a day and binder-page scanning. Browse all reports

3226 report editions made and 7282 dated calls still open, each with what would prove it wrong written down at the time and never edited. Counted November 14, 2026. How our calls scored

Explore

Koffing price and historyThe live card page: price, chart and graded ladder.All Delta Species pricesEvery card in the set, priced from the same records.Delta Species set reportHow the whole set has moved and what leads it.Cards illustrated by Sachiko AdachiEverything 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 Koffing cards