Butterfree #66, 1st Edition, Base Expansion Pack
Japanese edition
- Card number: #66
- ·Rarity: Rare
- ·Finish: Non-Holo
A PSA 9 Butterfree #66 1st Edition from Base Expansion Pack has a TCGBerg fair value of $71 as of Nov 15, 2026. It rests on 6 recorded sales, the latest on Aug 23, 2026. PSA has graded 37 copies at PSA 9. Sales evidence is limited, so treat this value as a rough estimate.
TCGBerg Algorithm (estimated from recorded sales).
6 sales · latest Aug 23, 2026
- Population · PSA 9
- 37
- Market cap
- $2.6K
- Volatility
- 2.0%
- YTD
- ↑ 18.4%
- Sales evidence
- Limited
TCGBerg fair value · PSA 9
$71
Based on 6 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, $71 on Aug 23, 2026, is in line with the $71 fair value (0.6% above). The value rests on 6 recorded PSA 9 sales. Its confidence band runs from $60 to $82. A PSA 10 ($345) is worth 4.9 times a PSA 9 ($71). Over the past 30 days the PSA 9 value has risen 7.6%. 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.
- Raw NM$40Ungraded · market price
- Raw LP$20Ungraded · market price
- Raw HP$3.50Ungraded · 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
9 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 | $71 | below fair value by -23.8% |
| Aug 22, 2026 | PSA10 | eBay | $299 | above fair value by +3.8% |
| May 17, 2026 | PSA9 | eBay | $40 | below fair value by -52.1% |
| May 11, 2026 | CGC Gem Mint 10 | Fanatics Collect | $77 | below fair value by -31.2% |
| Apr 7, 2026 | PSA10 | eBay | $220 | above fair value by +7.4% |
- $71Aug 23, 2026 · via eBayPSA9↓below fair value by 23.8%
- $299Aug 22, 2026 · via eBayPSA10↑above fair value by 3.8%
- $40May 17, 2026 · via eBayPSA9↓below fair value by 52.1%
- $77May 11, 2026 · via Fanatics CollectCGC Gem Mint 10↓below fair value by 31.2%
- $220Apr 7, 2026 · via eBayPSA10↑above fair value by 7.4%
| Apr 3, 2026 | PSA10 | eBay | $180 | below fair value by -1.1% |
| Mar 29, 2026 | PSA9 | eBay | $25 | below fair value by -60.6% |
| Feb 13, 2026 | PSA9 | eBay | $65 | above fair value by +0.4% |
- $180PSA10↓below fair value by 1.1%
- $25PSA9↓below fair value by 60.6%
- $65PSA9↑above fair value by 0.4%
4 more sales with Pro
Up to 20 recent sales, each with its venue and its gap to fair value.
↓Includes a sale 60.6% 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.
- CGC Gem Mint 10$1121d -7d -30d -
- Pop
- -
- Mcap
- -
- Evidence
- Sparse
- Last
- $77
- PSA10$3451d ·0.0%7d ↑0.9%30d ↑20.8%
- Pop
- 49
- Mcap
- $16.9K
- Evidence
- Sparse
- Last
- $299
- PSA9$711d ·0.0%7d ↑0.3%30d ↑7.6%
- Pop
- 37
- Mcap
- $2.6K
- Evidence
- Limited
- Last
- $71
| CGC Gem Mint 10 | $112 | - | - | - | - | - | - | Sparse | $776mo ago |
| PSA10 | $345 | 49 | $16.9K | 0.0% | ↑up 0.9% | ↑up 20.8% | ↑up 36.7% | Sparse | $2993mo ago |
| PSA9 | $71 | 37 | $2.6K | 0.0% | ↑up 0.3% | ↑up 7.6% | ↓down 24.1% | Limited | $713mo ago |
| PSA8 | $39 | 14 | $548 | 0.0% | 0.0% | ↓down 10.1% | ↓down 26.7% | Sparse | - |
| PSA7 | $36 | 2 | $71 | 0.0% | 0.0% | ↓down 1.4% | 0.0% | Sparse | - |
| PSA6 | $34 | 2 | $68 | 0.0% | 0.0% | ↓down 6.7% | ↓down 5.4% | Sparse | - |
| Raw | $40 | - | - | - | - | - | 0.0% | - | - |
Graded population report
How Butterfree'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.105 graded copies of Butterfree 1st Edition across 6 grades. The selected grade is highlighted.
PSA 9 makes up 35% of graded copies: 37 of 105. PSA 10 is the most common grade (47%).
Analysis
Butterfree - 1st Edition Normal at PSA 10 carries a TCGBerg fair value of $345 as of 2026-11-14. We track a TCGBerg fair value across 6 grades from Base Expansion Pack, from PSA 6 up to PSA 10. A graded population of 49 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 20.8%.