Koffing #51, Unlimited, Base Set
- Card number: #51/102
- ·Rarity: Common
- ·Finish: Non-Holo
A PSA 10 Koffing #51 Unlimited from Base Set has a TCGBerg fair value of $130 as of Nov 14, 2026. TCGBerg has recorded 30 PSA 10 sales of this card, the latest on Oct 27, 2026. PSA has graded 396 copies at PSA 10.
TCGBerg Algorithm (estimated from recorded sales).
- Population · PSA 10
- 396
- Market cap
- $51.5K
- Volatility
- 0.8%
- YTD
- ↑ 68.8%
- Sales evidence
- Very strong
TCGBerg fair value · PSA 10
$130
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, $135 on Oct 27, 2026, is in line with the $130 fair value (3.6% above). The value weighs 29 PSA 10 sales from the past year, not the latest one alone. Its confidence band runs from $125 to $135. A PSA 10 ($130) is worth 3.2 times a PSA 9 ($40). Over the past 30 days the PSA 10 value has risen 0.5%.
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 NM$0.83Ungraded · TCGBerg fair value
- Raw LP$0.44Ungraded · TCGBerg fair value
- Raw MP$0.26Ungraded · TCGBerg fair value
- Raw HP$0.21Ungraded · TCGBerg fair value
- Raw Damaged$0.18Ungraded · TCGBerg fair value
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 9, 2026 | Raw | tcgplayer | $0.92 | above fair value by +10.8% |
| Nov 9, 2026 | Raw | tcgplayer | $0.91 | above fair value by +9.6% |
| Nov 6, 2026 | PSA9 | eBay | $38 | below fair value by -5.5% |
| Nov 5, 2026 | CGC Gem Mint 10 | Alt | $30 | below fair value by -5.7% |
| Nov 3, 2026 | Raw | tcgplayer | $1.50 | above fair value by +89.9% |
- $0.92Nov 9, 2026 · via tcgplayerRaw↑above fair value by 10.8%
- $0.91Nov 9, 2026 · via tcgplayerRaw↑above fair value by 9.6%
- $38Nov 6, 2026 · via eBayPSA9↓below fair value by 5.5%
- $30Nov 5, 2026 · via AltCGC Gem Mint 10↓below fair value by 5.7%
- $1.50Nov 3, 2026 · via tcgplayerRaw↑above fair value by 89.9%
| Nov 3, 2026 | Raw | tcgplayer | $6.50 | above fair value by +722.8% |
| Nov 2, 2026 | Raw | tcgplayer | $0.51 | below fair value by -35.4% |
| Nov 1, 2026 | Raw | tcgplayer | $0.95 | above fair value by +15.9% |
- $6.50Raw↑above fair value by 722.8%
- $0.51Raw↓below fair value by 35.4%
- $0.95Raw↑above fair value by 15.9%
15 more sales with Pro
Up to 20 recent sales, each with its venue and its gap to fair value.
↓Includes a sale 35.4% 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 Gem Mint 10$321d -7d -30d -
- Pop
- 249
- Mcap
- $7.9K
- Evidence
- Strong
- Last
- $30
- CGC9.5$4.631d -7d -30d -
- Pop
- 80
- Mcap
- $370
- Evidence
- Sparse
- Last
- $1.68
- PSA10$1301d ↑0.1%7d ↑0.9%30d ↑0.5%
- Pop
- 396
- Mcap
- $51.5K
- Evidence
- Very strong
- Last
- $135
| Listings | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CGC Gem Mint 10 | $32 | 249 | $7.9K | - | - | - | - | Strong | $301w ago | |
| CGC9.5 | $4.63 | 80 | $370 | - | - | - | - | Sparse | $1.685mo ago | |
| PSA10 | $130 | 396 | $51.5K | ↑up 0.1% | ↑up 0.9% | ↑up 0.5% | ↑up 13.5% | Very strong | $1353w ago | |
| PSA9 | $40 | 629 | $25.4K | ↑up 0.4% | ↑up 0.6% | ↑up 1.3% | ↑up 6.1% | Very strong | $381w ago | |
| PSA8 | $31 | 242 | $7.4K | ↑up 0.5% | ↑up 1.1% | ↑up 4.1% | ↑up 37.3% | Strong | $281mo ago | |
| PSA7 | $18 | 86 | $1.6K | ↑up 0.1% | ↑up 2.9% | ↓down 2.5% | ↑up 18.1% | Limited | $123w ago | |
| PSA6 | $17 | 52 | $909 | 0.0% | ↑up 1.0% | ↓down 6.1% | ↑up 20.3% | Limited | $212mo ago | |
| PSA5 | $17 | 26 | - | 0.0% | ↑up 1.0% | ↓down 6.1% | ↑up 20.3% | Sparse | $1811mo ago | |
| PSA4 | $14 | 11 | - | 0.0% | ↓down 18.9% | ↑up 22.9% | ↓down 6.1% | Sparse | $205mo ago | |
| Raw | $0.83 | - | - | - | ↑up 5.1% | ↓down 2.4% | - | Very strong | $0.925d 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.3,427 graded copies of Koffing Unlimited across 37 grades. The selected grade is highlighted.
PSA 10 makes up 12% of graded copies: 396 of 3,427. PSA 9 is the most common grade (18%).
Analysis
Koffing - Unlimited Normal at PSA 10 carries a TCGBerg fair value of $130 as of 2026-11-14. We track a TCGBerg fair value across 9 grades from Base Set, from CGC 9.5 up to PSA 10. A graded population of 396 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 0.5%.
