Tentacool #020, 1st Edition, Undone Seal
Japanese edition
- Card number: #020
- ·Finish: Non-Holo
A PSA 10 Tentacool #020 1st Edition from Undone Seal has a TCGBerg fair value of $124 as of Nov 15, 2026. It rests on 2 recorded sales, the latest on Jun 22, 2026. PSA has graded 17 copies at PSA 10. Sales evidence is sparse, so treat this value as a rough estimate.
TCGBerg Algorithm (estimated from recorded sales).
2 sales · latest Jun 22, 2026
- Population · PSA 10
- 17
- Market cap
- $2.1K
- Volatility
- 11.4%
- YTD
- -
- Sales evidence
- Sparse
TCGBerg fair value · PSA 10
$124
Based on 2 recorded sales. Latest sale: Jun 22, 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 last PSA 10 sale, $53 on Jun 22, 2026, sits 57.3% below the $124 fair value. The value rests on 2 recorded PSA 10 sales. With so few PSA 10 sales on record, a single sale can sit far from the value. Its confidence band runs from $100 to $148. A PSA 10 ($124) is worth 4.0 times a PSA 9 ($31). Over the past 30 days the PSA 10 value has risen 25.8%. With sparse 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.
- Raw MP$2.00Ungraded · market price
- Raw LP$1.75Ungraded · 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
2 trackedEach sale against the grade's fair value on the day it sold.
| Date | Grade | Venue | Price | vs fair value |
|---|---|---|---|---|
| Jun 22, 2026 | PSA10 | Fanatics Collect | $53 | below fair value by -12.0% |
| May 20, 2026 | PSA10 | eBay | $70 | at fair value by 0.0% |
- $53Jun 22, 2026 · via Fanatics CollectPSA10↓below fair value by 12.0%
- $70May 20, 2026 · via eBayPSA10·at fair value by 0.0%
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$1241d ↓0.1%7d ↓0.1%30d ↑25.8%
- Pop
- 17
- Mcap
- $2.1K
- Evidence
- Sparse
- Last
- $53
- PSA9$311d ↑0.2%7d ↓0.3%30d ↑37.1%
- Pop
- 3
- Mcap
- $94
- Evidence
- Sparse
- Last
- -
- PSA8$111d ·0.0%7d ↑0.2%30d ↑25.6%
- Pop
- 1
- Mcap
- $11
- Evidence
- Sparse
- Last
- -
| PSA10 | $124 | 17 | $2.1K | ↓down 0.1% | ↓down 0.1% | ↑up 25.8% | ↑up 95.7% | Sparse | $535mo ago |
| PSA9 | $31 | 3 | $94 | ↑up 0.2% | ↓down 0.3% | ↑up 37.1% | ↑up 118.8% | Sparse | - |
| PSA8 | $11 | 1 | $11 | 0.0% | ↑up 0.2% | ↑up 25.6% | ↑up 139.3% | Sparse | - |
| PSA7 | $4.19 | 0 | - | ↓down 0.2% | ↑up 0.7% | ↑up 15.1% | ↑up 161.9% | Sparse | - |
| PSA6 | $3.82 | 0 | - | 0.0% | ↑up 0.3% | ↑up 25.7% | ↑up 138.8% | Sparse | - |
| Raw | $1.75 | - | - | 0.0% | 0.0% | 0.0% | 0.0% | - | - |
PSA population report
How Tentacool'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.21 graded copies of Tentacool 1st Edition across 3 grades. The selected grade is highlighted.
PSA 10 makes up 81% of graded copies: 17 of 21. It’s the most common grade for this card.
Analysis
Tentacool - 1st Edition at PSA 10 carries a TCGBerg fair value of $124 as of 2026-11-15. We track a TCGBerg fair value across 5 grades from Undone Seal, from PSA 6 up to PSA 10. A graded population of 17 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 risen 25.8%.