Tentacruel #021, Normal, Undone Seal
Japanese edition
- Card number: #021
- ·Finish: Non-Holo
A PSA 8 Tentacruel #021 Normal from Undone Seal has a TCGBerg fair value of $8.50 as of Nov 15, 2026. It rests on 1 recorded sale, the latest on Jan 14, 2022. PSA has graded 1 copy at PSA 8. Sales evidence is sparse, so treat this value as a rough estimate.
TCGBerg Algorithm (estimated from recorded sales).
1 sale · latest Jan 14, 2022
- Population · PSA 8
- 1
- Market cap
- $9
- Volatility
- 0.0%
- YTD
- · 0.0%
- Sales evidence
- Sparse
TCGBerg fair value · PSA 8
$8.50
Based on 1 recorded sale. Latest sale: Jan 14, 2022.
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 8. 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 1 recorded PSA 8 sale. Its confidence band runs from $6.38 to $11. 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 HP$3.00Ungraded · 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
1 trackedEach sale against the grade's fair value on the day it sold.
| Date | Grade | Venue | Price | vs fair value |
|---|---|---|---|---|
| Nov 13, 2026 | CGC Gem Mint 10 | Fanatics Collect | $20 | at fair value by 0.0% |
- $20Nov 13, 2026 · via Fanatics CollectCGC Gem Mint 10·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.
- CGC Gem Mint 10$201d -7d -30d -
- Pop
- -
- Mcap
- -
- Evidence
- Sparse
- Last
- $20
- PSA8$8.501d ·0.0%7d ·0.0%30d ·0.0%
- Pop
- 1
- Mcap
- $9
- Evidence
- Sparse
- Last
- -
- Raw$3.001d ·0.0%7d ·0.0%30d ·0.0%
- Pop
- -
- Mcap
- -
- Evidence
- -
- Last
- $3.00
| CGC Gem Mint 10 | $20 | - | - | - | - | - | - | Sparse | $202d ago |
| PSA8 | $8.50 | 1 | $9 | 0.0% | 0.0% | 0.0% | 0.0% | Sparse | - |
| Raw | $3.00 | - | - | 0.0% | 0.0% | 0.0% | 0.0% | - | $3.005mo ago |
PSA population report
How Tentacruel'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 graded copies of Tentacruel Normal across 2 grades. The selected grade is highlighted.
PSA 8 makes up 33% of graded copies: 1 of 3. It’s the scarcest grade tracked: a strong scarcity signal.
Analysis
Tentacruel at CGC Gem Mint 10 carries a TCGBerg fair value of $20 as of 2026-11-14. We track a TCGBerg fair value across 2 grades from Undone Seal, from PSA 8 up to CGC Gem Mint 10. The CGC Gem Mint 10 valuation rests on sparse sales evidence.