Grass Energy #129, 1st Edition, Gym Challenge
- GC

- ·Card number: #129/132
- ·Rarity: Common
- ·Finish: Non-Holo
A PSA 10 Grass Energy #129 1st Edition from Gym Challenge has a TCGBerg fair value of $255 as of Nov 15, 2026. It rests on 11 recorded sales, the latest on Oct 10, 2026. PSA has graded 42 copies at PSA 10. Sales evidence is sparse, so treat this value as a rough estimate.
TCGBerg Algorithm (estimated from recorded sales).
11 sales · latest Oct 10, 2026
- Population · PSA 10
- 42
- Market cap
- $10.7K
- Volatility
- 0.8%
- YTD
- ↑ 112.3%
- Sales evidence
- Sparse
TCGBerg fair value · PSA 10
$255
Based on 11 recorded sales. Latest sale: Oct 10, 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, $265 on Oct 10, 2026, is in line with the $255 fair value (4.0% above). The value rests on 11 recorded PSA 10 sales. Its confidence band runs from $222 to $288. A PSA 10 ($255) is worth 7.2 times a PSA 9 ($36). Over the past 30 days the PSA 10 value has fallen 1.5%. 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 NM$1.87Ungraded · TCGBerg fair value
- Raw LP$0.83Ungraded · TCGBerg fair value
- Raw MP$0.60Ungraded · market price
- Raw HP$0.49Ungraded · market price
- Raw Damaged$0.43Ungraded · 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
20 trackedEach sale against the grade's fair value on the day it sold.
| Date | Grade | Venue | Price | vs fair value |
|---|---|---|---|---|
| Nov 8, 2026 | PSA9 | eBay | $23 | below fair value by -47.8% |
| Nov 3, 2026 | Raw | tcgplayer | $3.28 | above fair value by +72.6% |
| Oct 30, 2026 | Raw | tcgplayer | $1.81 | above fair value by +8.4% |
| Oct 15, 2026 | Raw | tcgplayer | $1.10 | below fair value by -12.0% |
| Oct 12, 2026 | Raw | tcgplayer | $3.28 | above fair value by +162.4% |
- $23Nov 8, 2026 · via eBayPSA9↓below fair value by 47.8%
- $3.28Nov 3, 2026 · via tcgplayerRaw↑above fair value by 72.6%
- $1.81Oct 30, 2026 · via tcgplayerRaw↑above fair value by 8.4%
- $1.10Oct 15, 2026 · via tcgplayerRaw↓below fair value by 12.0%
- $3.28Oct 12, 2026 · via tcgplayerRaw↑above fair value by 162.4%
| Oct 10, 2026 | PSA10 | eBay | $265 | above fair value by +7.3% |
| Oct 1, 2026 | Raw | tcgplayer | $3.28 | above fair value by +150.4% |
| Sep 21, 2026 | Raw | tcgplayer | $1.59 | above fair value by +21.4% |
- $265PSA10↑above fair value by 7.3%
- $3.28Raw↑above fair value by 150.4%
- $1.59Raw↑above fair value by 21.4%
15 more sales with Pro
Up to 20 recent sales, each with its venue and its gap to fair value.
↓Includes a sale 51.1% 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.
- CGC8$161d -7d -30d -
- Pop
- 7
- Mcap
- -
- Evidence
- Sparse
- Last
- -
- CGC7$121d -7d -30d -
- Pop
- 2
- Mcap
- -
- Evidence
- Sparse
- Last
- -
- PSA10$2551d ·0.0%7d ↑0.1%30d ↓1.5%
- Pop
- 42
- Mcap
- $10.7K
- Evidence
- Sparse
- Last
- $265
| Listings | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CGC8 | $16 | 7 | - | - | - | - | - | Sparse | - | |
| CGC7 | $12 | 2 | - | - | - | - | - | Sparse | - | |
| PSA10 | $255 | 42 | $10.7K | 0.0% | ↑up 0.1% | ↓down 1.5% | ↑up 26.8% | Sparse | $2651mo ago | |
| PSA9 | $36 | 74 | $2.6K | ↓down 2.6% | ↓down 18.9% | ↓down 15.4% | ↑up 11.7% | Limited | $231w ago | |
| PSA8 | $23 | 25 | $584 | 0.0% | 0.0% | ↓down 21.0% | ↑up 69.3% | Sparse | - | |
| PSA7 | $17 | 17 | $286 | 0.0% | ↑up 0.1% | ↓down 3.1% | ↑up 28.9% | Sparse | $7.504mo ago | |
| PSA6 | $16 | 3 | $48 | 0.0% | 0.0% | ↓down 3.9% | ↑up 21.9% | Sparse | - | |
| PSA5 | $12 | 1 | - | 0.0% | 0.0% | ↓down 5.1% | ↓down 10.3% | Sparse | - | |
| Raw | $1.87 | - | - | - | ↓down 1.6% | ↑up 42.7% | - | Strong | $3.282w ago |
Graded population report
How Grass Energy'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.269 graded copies of Grass Energy 1st Edition across 19 grades. The selected grade is highlighted.
PSA 10 makes up 16% of graded copies: 42 of 269. PSA 9 is the most common grade (28%).
Analysis
Grass Energy - 1st Edition Normal at PSA 10 carries a TCGBerg fair value of $255 as of 2026-11-14. We track a TCGBerg fair value across 8 grades from Gym Challenge, from PSA 5 up to PSA 10. A graded population of 42 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 1.5%.