Koffing #1, 1st Edition, Base Expansion Pack
Japanese edition
- Card number: #1
- ·Rarity: Common
- ·Finish: Non-Holo
A PSA 10 Koffing #1 1st Edition from Base Expansion Pack has a TCGBerg fair value of $216 as of Nov 15, 2026. TCGBerg has recorded 23 PSA 10 sales of this card, the latest on Nov 9, 2026. PSA has graded 115 copies at PSA 10.
TCGBerg Algorithm (estimated from recorded sales).
- Population · PSA 10
- 115
- Market cap
- $24.9K
- Volatility
- 7.2%
- YTD
- ↑ 197.8%
- Sales evidence
- Very strong
TCGBerg fair value · PSA 10
$216
Price history
Weekly fair value over time, plus a confidence band around it: how precisely we can pin the value, which tightens as more sales confirm it. Dots mark individual sales, snapped to their week: red when above fair value (a premium), green when below (a deal), hollow when flagged as an outlier. Switch the active grade with the selector above.Weekly fair value for PSA 10. Shaded area is the confidence band: how precisely we can pin the value; it tightens as more sales confirm it. Dots are individual sales. Confidence band: how precisely we can pin the fair value. It widens when sales scatter and narrows as more sales back the value up. The dots show the actual sale prices.
What the evidence says
The last PSA 10 sale, $210 on Nov 9, 2026, is in line with the $216 fair value (2.9% below). The value weighs 22 PSA 10 sales from the past year, not the latest one alone. Its confidence band runs from $205 to $227. A PSA 10 ($216) is worth 4.5 times a PSA 9 ($48). Over the past 30 days the PSA 10 value has risen 20.8%.
TCGBerg fair value by grade
Side-by-side comparison of value across every grade and ungraded condition we track for this printing. The bar chart uses a log scale so raw and gem-mint fit on one axis. Solid bars are the TCGBerg fair value, modelled from recorded sales. Hatched bars are the latest market price instead, shown for ungraded conditions that trade too rarely for us to price one honestly.Value at each grade and ungraded condition. Log scale. Tap a row to switch the whole page.
- Raw HP$13Ungraded · market price
- Raw NM$12Ungraded · market price
- Raw LP$11Ungraded · market price
- Raw MP$6.27Ungraded · market price
- Raw Damaged$3.15Ungraded · market price
Behind the scenes
How the published fair value for this grade was produced: the sales it rests on, how they were put together, and every recorded change afterwards. It describes one saved calculation, not a live recomputation.What goes into this price, and how much we know.
Recent sales
20 trackedEach sale against the grade's fair value on the day it sold.
| Date | Grade | Venue | Price | vs fair value |
|---|---|---|---|---|
| Nov 10, 2026 | PSA8 | eBay | $33 | above fair value by +32.0% |
| Nov 9, 2026 | PSA10 | eBay | $210 | below fair value by -2.9% |
| Oct 28, 2026 | PSA10 | eBay | $220 | above fair value by +2.5% |
| Oct 24, 2026 | Raw | tcgplayer | $9.68 | at fair value by 0.0% |
| Oct 23, 2026 | PSA10 | eBay | $199 | above fair value by +1.6% |
- $33Nov 10, 2026 · via eBayPSA8↑above fair value by 32.0%
- $210Nov 9, 2026 · via eBayPSA10↓below fair value by 2.9%
- $220Oct 28, 2026 · via eBayPSA10↑above fair value by 2.5%
- $9.68Oct 24, 2026 · via tcgplayerRaw·at fair value by 0.0%
- $199Oct 23, 2026 · via eBayPSA10↑above fair value by 1.6%
| Oct 22, 2026 | PSA10 | eBay | $225 | above fair value by +14.9% |
| Oct 5, 2026 | PSA10 | eBay | $245 | above fair value by +39.0% |
| Sep 18, 2026 | PSA8 | eBay | $25 | below fair value by -44.3% |
- $225PSA10↑above fair value by 14.9%
- $245PSA10↑above fair value by 39.0%
- $25PSA8↓below fair value by 44.3%
15 more sales with Pro
Up to 20 recent sales, each with its venue and its gap to fair value.
↓Includes a sale 50.7% below fair value
All grades matrix
Every grade we track for this printing. Click any column header to sort; the rightmost column jumps you to listings for that grade.
- CGC Pristine 10$451d -7d -30d -
- Pop
- -
- Mcap
- -
- Evidence
- Sparse
- Last
- $75
- CGC Gem Mint 10$341d -7d -30d -
- Pop
- -
- Mcap
- -
- Evidence
- Limited
- Last
- $49
- CGC9.5$8.251d -7d -30d -
- Pop
- -
- Mcap
- -
- Evidence
- Limited
- Last
- $7.20
| CGC Pristine 10 | $45 | - | - | - | - | - | - | Sparse | $757mo ago |
| CGC Gem Mint 10 | $34 | - | - | - | - | - | - | Limited | $495mo ago |
| CGC9.5 | $8.25 | - | - | - | - | - | - | Limited | $7.207mo ago |
| PSA10 | $216 | 115 | $24.9K | ↓down 1.2% | ↑up 1.0% | ↑up 20.8% | ↑up 42.4% | Very strong | $2106d ago |
| PSA9 | $48 | 107 | $5.1K | ↑up 0.1% | ↑up 1.6% | ↑up 1.8% | ↑up 9.2% | Limited | $312mo ago |
| PSA8 | $25 | 30 | $750 | ↑up 1.3% | ↑up 1.3% | ↓down 41.7% | ↓down 42.7% | Strong | $335d ago |
| PSA7 | $23 | 3 | $70 | 0.0% | 0.0% | ↓down 37.7% | ↓down 4.7% | Sparse | - |
| PSA6 | $22 | 5 | $109 | 0.0% | 0.0% | ↓down 38.5% | ↓down 10.4% | Sparse | - |
| PSA5 | $22 | 3 | - | 0.0% | 0.0% | ↓down 38.5% | ↓down 10.4% | Sparse | - |
| Raw | $12 | - | - | 0.0% | ↓down 7.2% | ↓down 12.4% | ↑up 9.7% | - | $9.683w ago |
Graded population report
How Koffing's graded copies are spread across grades. Each bar is the number of copies graded at that grade; the percentage is that grade's share of the total graded population. These are recorded graded copies, not the total print run. A smaller population alone does not establish a price premium.265 graded copies of Koffing 1st Edition across 8 grades. The selected grade is highlighted.
PSA 10 makes up 43% of graded copies: 115 of 265. It’s the most common grade for this card.
Analysis
Koffing - 1st Edition Normal at PSA 10 carries a TCGBerg fair value of $216 as of 2026-11-14. We track a TCGBerg fair value across 9 grades from Base Expansion Pack, from CGC 9.5 up to PSA 10. A graded population of 115 copies sits behind the PSA 10 grade. The PSA 10 valuation rests on very strong sales evidence. Over the past 30 days, the PSA 10 TCGBerg fair value has risen 20.8%.