Question 1

What is the current market value of Undersea Ruins #138?

Accepted Answer

For Undersea Ruins in Aquapolis, the current reference price is $4.00. Week-over-week change is limited (-0.5%), indicating short-term stability. Current value is elevated versus the 30-day mean ($3.91), by 2.4%. Its 90-day trading band runs between $3.57 and $4.06, producing a 12% range and low-volatility behavior. The listed rarity for this print is Uncommon.

Question 2

Is Undersea Ruins #138 a good investment or collectible?

Accepted Answer

Collector-focused market read: Short-term movement is stable (-0.5% over 7 days), with price action clustered near recent averages. With a 12% 90-day spread ($3.57-$4.06), this card currently tracks as low-volatility. Current value remains close to its 30-day mean ($3.91). Graded context points to a substantial premium curve, with PSA 10 at +1775% above raw pricing. PSA 9 is currently around $40.23, while PSA 10 is $75.00.

Question 3

What is Undersea Ruins #138 and what makes it special?

Accepted Answer

Undersea Ruins appears in Aquapolis, released in 2003. Its card type is Trainer. The rarity label is Uncommon. Card subtype classification is Stadium. The card text reads: 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. No explicit attack names are available in the loaded card metadata. Uncommon-tier prints usually balance accessibility with moderate collector demand.

Question 4

What set is Undersea Ruins #138 from, and when was it released?

Accepted Answer

Aquapolis was released in 2003. Series classification for this set is E-Card. The checklist contains 182 cards, placing it in a large expansion range. As of 2026, the set is 23 years old and fits a legacy-era profile. Within this set, Undersea Ruins is card number 138 with a Uncommon designation.

Undersea Ruins #138

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