Undersea Ruins Aquapolis #138
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 $14.99 ungraded, with a PSA 10 worth around $75 — a gem-mint grading premium of roughly 5× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.
Prices last updated 2 July 2026.
Price by variant
TCGplayer market price per printing — reverse holo, 1st edition and unlimited often differ sharply.
| Grade | Relative value | Price |
|---|---|---|
| PSA 10 | $75$75–$75 | |
| PSA 9 | $40$30–$40 | |
| PSA 8 | $13$13–$13 | |
| PSA 7 | $10$10–$12 | |
| PSA 6 | $7$7–$7 | |
| PSA 5 | $2$2–$2 |
Price history · raw near-mint
Recent sold prices
Real completed hammer prices from Fanatics Collect weekly and premier auctions, refreshed periodically. Grade read from the listing title.
Population across graders
Should you grade it?
after ~$70.74 grading fee → 5.0× the raw value
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $75.00 | $70.74 | −$11 | 5.0× |
| PSA 9 | $40.23 | $70.39 | −$45 | 2.7× |
| PSA 8 | $13.00 | $70.12 | −$72 | 0.9× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 53 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 15.1% | $75.00 |
| PSA 9 | 41.5% | $40.00 |
| PSA ≤8 | 43.4% | $15.00 |
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.
We'll email you when this card's value crosses your target.
Where to buy
Cross-market prices
7% spreadCurrently 7% 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.
🇪🇺 Cardmarket price · Europe
76% cheaper than the USCard text
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 details
More from Aquapolis
Frequently asked questions
How much is Undersea Ruins (Aquapolis #138) worth?
As of 2 July 2026, Undersea Ruins from Aquapolis is worth approximately $14.99 ungraded (near-mint), and around $75 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 $75 — roughly 5× the raw ungraded value of $14.99.
Should I grade my Undersea Ruins?
A PSA 10 sells for about $75 versus $14.99 raw — roughly a 5× 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 $14.99 ungraded.