Impostor Professor Oak #73, 1999-2000 Copyright, Base Set
- Card number: #73/102
- ·Rarity: Rare
- ·Finish: Non-Holo
A PSA 9 Impostor Professor Oak #73 1999-2000 Copyright from Base Set has a TCGBerg fair value of $117 as of Nov 15, 2026. It rests on 3 recorded sales, the latest on Aug 23, 2026. PSA has graded 21 copies at PSA 9. Sales evidence is limited, so treat this value as a rough estimate.
TCGBerg Algorithm (estimated from recorded sales).
3 sales · latest Aug 23, 2026
- Population · PSA 9
- 21
- Market cap
- $2.5K
- Volatility
- 4.6%
- YTD
- ↑ 120.5%
- Sales evidence
- Limited
TCGBerg fair value · PSA 9
$117
Based on 3 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, $80 on Aug 23, 2026, sits 31.7% below the $117 fair value. The value rests on 3 recorded PSA 9 sales. With so few PSA 9 sales on record, a single sale can sit far from the value. Its confidence band runs from $88 to $147. A PSA 10 ($746) is worth 6.4 times a PSA 9 ($117). Over the past 30 days the PSA 9 value has fallen 8.7%. 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
4 trackedEach sale against the grade's fair value on the day it sold.
| Date | Grade | Venue | Price | vs fair value |
|---|---|---|---|---|
| Aug 23, 2026 | PSA9 | eBay | $80 | below fair value by -17.4% |
| Aug 17, 2026 | PSA9 | eBay | $142 | above fair value by +46.8% |
| Aug 15, 2026 | PSA8 | eBay | $68 | above fair value by +18.1% |
| Feb 3, 2026 | PSA10 | eBay | $390 | above fair value by +9.2% |
- $80Aug 23, 2026 · via eBayPSA9↓below fair value by 17.4%
- $142Aug 17, 2026 · via eBayPSA9↑above fair value by 46.8%
- $68Aug 15, 2026 · via eBayPSA8↑above fair value by 18.1%
- $390Feb 3, 2026 · via eBayPSA10↑above fair value by 9.2%
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$131d ↓0.7%7d ↓0.7%30d ↓15.5%
- Pop
- 1
- Mcap
- -
- Evidence
- Sparse
- Last
- -
- PSA10$7461d ·0.0%7d ·0.0%30d ↓4.6%
- Pop
- 12
- Mcap
- $8.9K
- Evidence
- Sparse
- Last
- $390
- PSA9$1171d ↑0.1%7d ↑0.1%30d ↓8.7%
- Pop
- 21
- Mcap
- $2.5K
- Evidence
- Limited
- Last
- $80
| CGC6 | $13 | 1 | - | ↓down 0.7% | ↓down 0.7% | ↓down 15.5% | ↓down 17.0% | Sparse | - |
| PSA10 | $746 | 12 | $8.9K | 0.0% | 0.0% | ↓down 4.6% | ↑up 32.4% | Sparse | $39010mo ago |
| PSA9 | $117 | 21 | $2.5K | ↑up 0.1% | ↑up 0.1% | ↓down 8.7% | ↑up 29.1% | Limited | $803mo ago |
| PSA8 | $61 | 12 | $731 | 0.0% | ↑up 0.1% | ↓down 3.3% | ↑up 5.9% | Limited | $683mo ago |
| PSA7 | $35 | 7 | $246 | 0.0% | 0.0% | ↓down 10.7% | ↑up 4.6% | Sparse | - |
| PSA6 | $25 | 4 | $101 | 0.0% | 0.0% | ↓down 3.7% | ↑up 16.7% | Sparse | - |
| PSA5 | $19 | 1 | - | 0.0% | 0.0% | ↓down 11.4% | ↑up 3.7% | Sparse | - |
Graded population report
How Impostor Professor Oak'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.78 graded copies of Impostor Professor Oak 1999-2000 Copyright across 15 grades. The selected grade is highlighted.
PSA 9 makes up 27% of graded copies: 21 of 78. It’s the most common grade for this card.
Analysis
Impostor Professor Oak - 1999-2000 Copyright Normal at PSA 10 carries a TCGBerg fair value of $746 as of 2026-11-14. We track a TCGBerg fair value across 7 grades from Base Set, from CGC 6 up to PSA 10. A graded population of 12 copies sits behind the PSA 10 grade. The PSA 10 valuation rests on sparse sales evidence. Over the past 30 days, the PSA 10 TCGBerg fair value has fallen 4.6%.