Koffing #51, 1999-2000 Copyright, Base Set
- Card number: #51/102
- ·Rarity: Common
- ·Finish: Non-Holo
A PSA 9 Koffing #51 1999-2000 Copyright from Base Set has a TCGBerg fair value of $44 as of Nov 14, 2026. It rests on 10 recorded sales, the latest on Aug 23, 2026. PSA has graded 62 copies at PSA 9. Sales evidence is limited, so treat this value as a rough estimate.
TCGBerg Algorithm (estimated from recorded sales).
10 sales · latest Aug 23, 2026
- Population · PSA 9
- 62
- Market cap
- $2.7K
- Volatility
- 2.7%
- YTD
- ↑ 76.3%
- Sales evidence
- Limited
TCGBerg fair value · PSA 9
$44
Based on 10 recorded sales. Latest sale: Aug 23, 2026.
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 9. 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 9 sale, $45 on Aug 23, 2026, is in line with the $44 fair value (1.8% above). The value rests on 10 recorded PSA 9 sales. Its confidence band runs from $39 to $49. A PSA 10 ($199) is worth 4.5 times a PSA 9 ($44). Over the past 30 days the PSA 9 value has fallen 1.8%. With limited sales evidence, read the gap and the band as rough guides.
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.
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
10 trackedEach sale against the grade's fair value on the day it sold.
| Date | Grade | Venue | Price | vs fair value |
|---|---|---|---|---|
| Sep 18, 2026 | PSA8 | eBay | $31 | above fair value by +9.5% |
| Sep 2, 2026 | PSA6 | eBay | $7.60 | below fair value by -27.7% |
| Aug 23, 2026 | PSA9 | eBay | $45 | above fair value by +11.9% |
| Jul 17, 2026 | PSA7 | eBay | $13 | below fair value by -13.8% |
| Jul 5, 2026 | PSA9 | eBay | $36 | below fair value by -6.0% |
- $31Sep 18, 2026 · via eBayPSA8↑above fair value by 9.5%
- $7.60Sep 2, 2026 · via eBayPSA6↓below fair value by 27.7%
- $45Aug 23, 2026 · via eBayPSA9↑above fair value by 11.9%
- $13Jul 17, 2026 · via eBayPSA7↓below fair value by 13.8%
- $36Jul 5, 2026 · via eBayPSA9↓below fair value by 6.0%
| May 29, 2026 | PSA10 | eBay | $134 | below fair value by -5.6% |
| Apr 21, 2026 | PSA8 | eBay | $25 | above fair value by +2.5% |
| Dec 31, 2025 | PSA9 | eBay | $21 | below fair value by -16.8% |
- $134PSA10↓below fair value by 5.6%
- $25PSA8↑above fair value by 2.5%
- $21PSA9↓below fair value by 16.8%
5 more sales with Pro
Up to 20 recent sales, each with its venue and its gap to fair value.
↓Includes a sale 21.9% 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.
- CGC6-1d -7d -30d -
- Pop
- 2
- Mcap
- -
- Evidence
- Sparse
- Last
- -
- CGC7-1d -7d -30d -
- Pop
- 2
- Mcap
- -
- Evidence
- Sparse
- Last
- -
- PSA10$1991d ·0.0%7d ↑0.1%30d ↑3.8%
- Pop
- 55
- Mcap
- $10.9K
- Evidence
- Limited
- Last
- $134
| CGC6 | - | 2 | - | - | - | - | - | Sparse | - |
| CGC7 | - | 2 | - | - | - | - | - | Sparse | - |
| PSA10 | $199 | 55 | $10.9K | 0.0% | ↑up 0.1% | ↑up 3.8% | ↑up 25.6% | Limited | $1346mo ago |
| PSA9 | $44 | 62 | $2.7K | ↑up 0.8% | ↓down 1.6% | ↓down 1.8% | ↑up 17.5% | Limited | $453mo ago |
| PSA8 | $30 | 21 | $638 | ↑up 0.4% | ↓down 0.7% | ↓down 5.3% | ↑up 23.0% | Limited | $312mo ago |
| PSA7 | $22 | 5 | $111 | 0.0% | ↑up 0.4% | ↑up 0.4% | ↑up 31.0% | Sparse | $134mo ago |
| PSA6 | $13 | 4 | $50 | ↑up 0.1% | ↑up 0.1% | ↓down 2.3% | ↓down 25.8% | Sparse | $7.602mo ago |
| PSA5 | $12 | 2 | - | 0.0% | 0.0% | ↑up 8.5% | ↑up 9.1% | Sparse | $5.002y 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.260 graded copies of Koffing 1999-2000 Copyright across 24 grades. The selected grade is highlighted.
PSA 9 makes up 24% of graded copies: 62 of 260. It’s the most common grade for this card.
Analysis
Koffing - 1999-2000 Copyright Normal at PSA 10 carries a TCGBerg fair value of $199 as of 2026-11-13. We track a TCGBerg fair value across 6 grades from Base Set, from PSA 5 up to PSA 10. A graded population of 55 copies sits behind the PSA 10 grade. The PSA 10 valuation rests on limited sales evidence. Over the past 30 days, the PSA 10 TCGBerg fair value has risen 3.8%.