Underground Lake #87, 1st Edition, Split Earth
Japanese edition
- Card number: #87/88
- ·Rarity: Uncommon
- ·Finish: Non-Holo
A PSA 10 Underground Lake #87 1st Edition from Split Earth has a TCGBerg fair value of $102 as of Nov 14, 2026. TCGBerg has recorded 3 PSA 10 sales of this card, the latest on Nov 1, 2026. PSA has graded 7 copies at PSA 10.
TCGBerg Algorithm (estimated from recorded sales).
- Population · PSA 10
- 7
- Market cap
- $711
- Volatility
- 0.6%
- YTD
- ↑ 17.1%
- Sales evidence
- Strong
TCGBerg fair value · PSA 10
$102
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, $100 on Nov 1, 2026, is in line with the $102 fair value (1.6% below). The value weighs 3 PSA 10 sales from the past year, not the latest one alone. Its confidence band runs from $89 to $114. A PSA 10 ($102) is worth 4.2 times a PSA 9 ($24). Over the past 30 days the PSA 10 value has fallen 0.2%.
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$7.00Ungraded · 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
4 trackedEach sale against the grade's fair value on the day it sold.
| Date | Grade | Venue | Price | vs fair value |
|---|---|---|---|---|
| Nov 1, 2026 | PSA10 | eBay | $100 | above fair value by +0.2% |
| Sep 14, 2026 | PSA9 | Fanatics Collect | $22 | below fair value by -2.8% |
| Aug 16, 2026 | PSA10 | eBay | $52 | below fair value by -6.5% |
| Jun 8, 2026 | PSA10 | eBay | $46 | below fair value by -24.6% |
- $100Nov 1, 2026 · via eBayPSA10↑above fair value by 0.2%
- $22Sep 14, 2026 · via Fanatics CollectPSA9↓below fair value by 2.8%
- $52Aug 16, 2026 · via eBayPSA10↓below fair value by 6.5%
- $46Jun 8, 2026 · via eBayPSA10↓below fair value by 24.6%
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$1021d ↑2.0%7d ↑1.8%30d ↓0.2%
- Pop
- 7
- Mcap
- $711
- Evidence
- Strong
- Last
- $100
- PSA9$241d ·0.0%7d ·0.0%30d ↓1.8%
- Pop
- 5
- Mcap
- $121
- Evidence
- Limited
- Last
- $22
- PSA8$231d ·0.0%7d ·0.0%30d ↑6.7%
- Pop
- 1
- Mcap
- $23
- Evidence
- Sparse
- Last
- -
| PSA10 | $102 | 7 | $711 | ↑up 2.0% | ↑up 1.8% | ↓down 0.2% | ↑up 82.7% | Strong | $1002w ago |
| PSA9 | $24 | 5 | $121 | 0.0% | 0.0% | ↓down 1.8% | ↓down 0.4% | Limited | $222mo ago |
| PSA8 | $23 | 1 | $23 | 0.0% | 0.0% | ↑up 6.7% | ↓down 5.3% | Sparse | - |
| PSA7 | $21 | 0 | - | 0.0% | 0.0% | ↓down 0.6% | ↑up 13.7% | Sparse | - |
| PSA6 | $21 | 0 | - | 0.0% | 0.0% | ↓down 0.6% | ↑up 13.7% | Sparse | - |
| PSA5 | $21 | 1 | - | 0.0% | 0.0% | ↓down 0.6% | ↑up 13.7% | Sparse | - |
| Raw | $7.00 | - | - | - | - | - | - | - | - |
PSA population report
How Underground Lake'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.14 graded copies of Underground Lake 1st Edition across 4 grades. The selected grade is highlighted.
PSA 10 makes up 50% of graded copies: 7 of 14. It’s the most common grade for this card.
Analysis
Underground Lake - 1st Edition Normal at PSA 10 carries a TCGBerg fair value of $102 as of 2026-11-14. We track a TCGBerg fair value across 6 grades from Split Earth, from PSA 7 up to PSA 10. A graded population of 7 copies sits behind the PSA 10 grade. The PSA 10 valuation rests on strong sales evidence. Over the past 30 days, the PSA 10 TCGBerg fair value has fallen 0.2%.