Professor Oak #T77, Trainer, Expansion Pack
Japanese edition
- Card number: #T77
- ·Rarity: Uncommon
- ·Finish: Non-Holo
A PSA 10 Professor Oak #T77 Trainer from Expansion Pack has a TCGBerg fair value of $359 as of Jul 19, 2026. It rests on 26 recorded sales, the latest on May 25, 2026. PSA has graded 109 copies at PSA 10. Sales evidence is limited, so treat this value as a rough estimate.
TCGBerg Algorithm (estimated from recorded sales).
26 sales · latest May 25, 2026
- Population · PSA 10
- 109
- Market cap
- $39.2K
- Volatility
- 2.8%
- YTD
- ↑ 204.9%
- Sales evidence
- Limited
TCGBerg fair value · PSA 10
$359
Based on 26 recorded sales. Latest sale: May 25, 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 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 value rests on 26 recorded PSA 10 sales. Its confidence band runs from $320 to $399. A PSA 10 ($359) is worth 4.7 times a PSA 9 ($76). Over the past 30 days the PSA 10 value has risen 12.7%. 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.
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.
- PSA10$3591d ↑5.0%7d ↑5.0%30d ↑12.7%
- Pop
- 109
- Mcap
- $39.2K
- Evidence
- Limited
- Last
- -
- PSA9$761d ↓1.2%7d ↓1.2%30d ↑6.7%
- Pop
- 112
- Mcap
- $8.5K
- Evidence
- Moderate
- Last
- -
- PSA8$351d ↑1.7%7d ↑1.7%30d ↑25.6%
- Pop
- 34
- Mcap
- $1.2K
- Evidence
- Limited
- Last
- -
| PSA10 | $359 | 109 | $39.2K | ↑up 5.0% | ↑up 5.0% | ↑up 12.7% | ↑up 37.6% | Limited | - |
| PSA9 | $76 | 112 | $8.5K | ↓down 1.2% | ↓down 1.2% | ↑up 6.7% | ↑up 45.4% | Moderate | - |
| PSA8 | $35 | 34 | $1.2K | ↑up 1.7% | ↑up 1.7% | ↑up 25.6% | ↑up 19.2% | Limited | - |
| PSA7 | $5.50 | 11 | $61 | 0.0% | 0.0% | 0.0% | 0.0% | Sparse | - |
PSA population report
How 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.266 graded copies of Professor Oak Trainer across 4 grades. The selected grade is highlighted.
PSA 10 makes up 41% of graded copies: 109 of 266. PSA 9 is the most common grade (42%).
Analysis
Professor Oak - Trainer at PSA 10 carries a TCGBerg fair value of $359 as of 2026-07-19. We track a TCGBerg fair value across 4 grades from Expansion Pack, from PSA 7 up to PSA 10. A graded population of 109 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 12.7%.