Koffing
Cosmic Eclipse Β· #243 Β· GXG
Fair-value verdict
Raw
$37.81
Stable No material movement in price, demand, or supply.
Sales β10%
PSA 10
How Market is measured The Market value is a robust median of PSAΒ 10 sold prices, a 7-day window when the card sells β₯5/week, widening to 30 to 60 days for thin volume, with an outlier filter. The chart plots the individual sales, so a recent spike can ride above this median. Reading raw vs. slab The two verdicts measure against different benchmarks, so they can point different directions without disagreeing. Raw is judged against the graded market, so a discount means the raw card is cheap relative to its PSAΒ 10. Slab is judged against fundamentals, so a premium means the PSAΒ 10 itself looks rich versus print scarcity, grading rates, and demand. Both can be true at once.$286.59
Grading How often this card grades PSA 10 (gem rate), what a PSA 10 sells for versus the raw card, and how many PSA 10s exist.
Gem rate 30% Β· 7.6Γ raw Β· 647 PSA 10s
Price historyΒ· 90d Β· % change
Overlays
PSA 10 line from 10 tracked eBay sales β a partial sample of eBay sold volume.
Investment Score
Koffing earns a 48/100 investment score and a C grade (fair hold). It's trading 33% above our fair value. It sits mid-pack in Cosmic Eclipse by price. Grading it to PSA-10 doesn't pencil at today's prices. It trades at a moderate pace.
- Demand3.9
- Scarcity6.5
- Stability7.1
This is a snapshot of demand fundamentals, not a forecast and not financial advice. "Gaining steam" just shows that the price has moved recently, not that it'll keep moving. The score measures durability, not how a card behaves in a crash. And keep an eye out for reprints, which can crash a chase card fast no matter how high the grade. Scores compare cards within the modern era (Mega Evolution, Scarlet & Violet, Sword & Shield) β not against vintage.
Supply shows both venues β eBay active listings + TCGplayer sellers (distinct units, not summed); the supply-trend gauge is eBay-driven for now, with the TCGplayer trend surfacing once its history is reliable, then blending. Sold/wk is TCGplayer; demand pressure = weekly TCGplayer sales Γ· eBay active listings (soft β hot) β a relative read, not a literal sell-through. Descriptive market context, not a forecast.
Across HyperPotion
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