Market value · ungraded
What's your copy worth?
What this price is based on
High confidence10 sales in 90 days, closely clustered.
Recent Raw sales
- Aug 14, 2026eBay — Undersea Ruins #138 Aquapolis 2002 138/147 E-Reader Trainer Pokemon Card$4.25
- Jul 27, 2026eBay — Undersea Ruins 138/147 Aquapolis MP Pokémon TCGMP$3.19
- Jul 24, 2026eBay — Undersea Ruins 138/147 Aquapolis, Uncommon$5.00
- Jul 20, 2026eBay — Trainer - Undersea Ruins - 138/147 - Aquapolis - Pokémon TCG - 2002 - NMNM$4.50
- Jul 11, 2026eBay — Trainer - Undersea Ruins - 138/147 - Aquapolis - Pokémon TCG - 2002 - LPLP$3.99
- Jul 4, 2026eBay — Undersea Ruins 138/147 Uncommon Aquapolis Pokemon Lightly PlayedLP$5.49
- Jun 14, 2026eBay — Undersea Ruins 138/147 Aquapolis Regular$3.99
- May 27, 2026eBay — Pokemon Card Undersea Ruins 138/147 Non Holo Aquapolis WOTC Light PlayLP$6.74
By grade
- Raw$4.3812 sales
- PSA 10$4003 sales
- CGC 9$11.402 sales
- CGC 8.5$15.342 sales
- CGC 10$18.602 sales
- CGC 9.5$4.251 sale
From 22 completed sales recorded between May 16, 2026 and Aug 14, 2026. Sold prices only — asking prices are never counted.
Grade it or not
NOT WORTH ITBased on 10 graded sales and 1,889,841 pop-report entries for a near-mint copy.
See the numbers — Trader plan and aboveBuy this card
✨ Is it worth it?
An AI market read of this card — value, momentum, grading economics, liquidity. It lays out the data; you decide.
Undersea Ruins is a Uncommon Pokémon card from Aquapolis (#138), illustrated by Midori Harada. It's a Stadium Trainer card. Its current blended market value is $5.40 ungraded, with a PSA 10 worth around $57 — a gem-mint grading premium of roughly 10× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.
Prices last updated 20 August 2026.
The receipts
Price history · Raw
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Recent sold prices
No recent sold listings tracked.
Should you grade it?
Expected return across every likely grade, after fees — the realistic average, not the best case. Only 40% of copies gem (PSA 10 best case −$19); most land at PSA 9 or below.
The odds
Undersea Ruins is a Uncommoncard — a guaranteed slot in every pack, not a rarity gamble, so there's no pull-odds figure for it.
Estimates only. Pack odds come from CardTrack's pack model (the same one behind the pack simulator) — not an official rate. Grading odds are the real cumulative PSA population, which skews toward nicer, resubmitted copies, so it overstates the true first-submission gem rate. Full grade-by-grade breakdown below.
Grade-by-grade ROI & risk-adjusted outcomesNet vs raw per target grade, plus the probability-weighted distribution
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $56.61 | $71 | −$19 | 10.5× |
| PSA 9 | $25.89 | $70 | −$50 | 4.8× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 30 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 40% | $57.00 |
| PSA 9 | 40% | $26.00 |
| PSA ≤8 | 20% | $5.00 |
Net = graded value − raw value − grading cost (tier fee + ~$20 round-trip shipping), using PSA fees as of 2026-06-28; the paused PSA Value tier is excluded so this isn't overstated. Gem rate is estimated from cumulative PSA population, which skews toward nicer, resubmitted copies — so it overstates the true grade rate. Treat it as a guide, not a guarantee.
Population across gradersPSA, CGC & BGS — every grade, with gem rates
Only 40% of 30 PSA-graded Undersea Ruins copies are a gem-mint 10 (12 of 30) — the rest grade lower.
Real graded population from PSA, CGC & BGS — a lower gem rate means a Undersea Ruins 10 is harder to pull.
Copies for sale right now
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All grades & conditions
Every grade we pricePSA / CGC / BGS ladder with per-grade population
| Grade | Relative value | Price |
|---|---|---|
| PSA 10pop 12 | $57$57–$57 | |
| PSA 9pop 12 | $26$26–$26 |
Raw condition ladderNM → damaged, with real sold medians where we have them
Market dataCross-market spread, EU price, momentum & community buzz
Cross-market prices
15% spreadCurrently 15% cheaper on PriceCharting than TCGplayer. These are independent market prices for the same card — a wide gap can mean a buying opportunity. Informational only, not arbitrage advice.
Market signal
Derived from this card's 90-day price history, recent trend and cross-market price gap. Informational, not advice.
Card textAttacks, abilities, weakness / resistance / retreat
This card stays in play when you play it. Discard this card if another Stadium card comes into play.
Once during each player's turn (before attacking), that player may flip a coin. If heads, that player chooses 1 of his or her Evolved Pokémon in play and discards the top Evolution card from that Pokémon, devolving it.
Card detailsSet, rarity, artist, Pokédex & specs
More from Aquapolis
Frequently asked questions
How much is Undersea Ruins (Aquapolis #138) worth?
As of 20 August 2026, Undersea Ruins from Aquapolis is worth approximately $5.40 ungraded (near-mint), and around $57 in PSA 10 gem mint. Values are blended from real Cardmarket, eBay sold and TCGplayer prices and update daily.
What is the PSA 10 price for Undersea Ruins?
A PSA 10 (gem mint) Undersea Ruins from Aquapolis is worth around $57 — roughly 10× the raw ungraded value of $5.40.
Should I grade my Undersea Ruins?
A PSA 10 sells for about $57 versus $5.40 raw — roughly a 10× uplift. Grading is worth it when that premium comfortably beats the grading fee and the card is clean enough to have a real shot at a 10. See the "Should you grade it?" estimate above for net profit per grade.
Is Undersea Ruins rare?
Undersea Ruins is a Uncommon card from Aquapolis (card #138), illustrated by Midori Harada. Its current blended market value is $5.40 ungraded.
Cite & embed this card
Free to use with attribution to CardTrack.
Undersea Ruins (Aquapolis #138) — Pokémon market value $5.40, PSA 10 $56.61. Source: CardTrack, https://cardtrack.com/pokemon/card/aquapolis/undersea-ruins-138<iframe src="https://cardtrack.com/embed/card?id=ecard2-138" width="100%" height="160" style="border:0;max-width:460px" title="Undersea Ruins price — CardTrack" loading="lazy"></iframe>
<p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>