TICKERMINT

Sea Monster of Theseus YU-GI-OH

Secret Rare · #RATE-EN081

Sea Monster of Theseus #RATE-EN081 (Raging Tempest) is worth about $20.83 today for an Unlimited copy, the TCGplayer market price for any condition as of 2026-10-28, down 8% over 30 days. 1st Edition copies are $6.98.

This card has 2 printings (TCGplayer market, 2026-10-28): Unlimited $20.83 (this page), 1st Edition $6.98 (on this page's chart).

price trend and the high since we began tracking: more ↓

Sea Monster of Theseus #RATE-EN081 is trending down: $20.83 today, down 8% in 30 days and 8% below its high of $22.67 (2026-09-16), the highest since we began tracking (2026-09-16), but near its low of $20.83 (2026-10-26). TCGplayer market price as of 2026-10-28, tracked daily since 2026-09-16. chart →

Price data for your app or store: API and daily history since 2024 · CSV download

$20.83
▼ 8.1% · 30d
Unlimited · TCGplayer market · daily · any condition ↗
condition prices from JustTCG listings, as of 2026-10-27
condition prices as of 2026-10-27; the chart and boards use the daily product tape
LOADING TAPE

WORTH GRADING?

WHERE TO BUY AND SELL

TCGplayer
$0.99
lowest listing · market $20.83
buy on TCGplayer ↗
eBay · raw
$16.99
asking floor · 6 active listings
shop active ↗ · sold ↗
eBay · PSA 10
no graded listings
no graded asks in the last scan
PSA 10 sold listings ↗
Buy-side estimate
$16.99
FAIR
a patient buyer pays about $16.99 delivered, from live asks, not sales
show the work →
TCGplayer $20.83 vs cheapest delivered eBay ask $16.99, so the market hasn't settled on a price yet
TCGplayer market$20.83verify ↗
TCGplayer lowest ask$0.99
eBay delivered floor (scanned 2d ago)$16.99the listing ↗
Formula: TCGplayer market, clamped between the cheapest real ask anywhere ($0.99) and the eBay floor ($16.99). 5 live ask(s) used.
sell to a card shop: $15 cash · $17 store credit · about 70% / 80% of market
Floors are the median of the three lowest clean asks. Marketplace links may earn TickerMint a commission; it never affects the numbers.
The verdict · premium
Across every game TickerMint tracks, cards 3-15% off their high after a month down 5-25% were higher 90 days later 50% of the time in our archive since 2024 (7,742 cases). That rate is mostly the 202448 to 5877 to 86marketplace fees of about 13% most short holds lose money. Use it to time a sale, not to flip.
The median move, the verdict and the grade-worthy math: try Premium free for 7 days →
GAME DATA[ + ] SHOW
ATTACK
2200
DEFENSE
1800
ATTRIBUTE
WATER
CARD TYPE
Fusion/Tuner Monster
DESCRIPTION
2 Tuners
MONSTERTYPE
Zombie

MORE FROM RAGING TEMPEST

FULL SET →

PRICE FAQ

What would a card shop pay for Sea Monster of Theseus?

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Shops and show vendors commonly offer about 70% of market in cash and 80% in store credit. At today's $20.83 market price that is roughly $15 cash or $17 trade for a near-mint copy. Selling it yourself on TCGplayer or eBay nets more after fees; see the seller-net answer below.

What is Sea Monster of Theseus (Raging Tempest) worth today?

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Sea Monster of Theseus [Unlimited] has a TCGplayer market price of $20.83 as of 2026-10-28. 1st Edition copies are $6.98.

Is Sea Monster of Theseus going up or down in price?

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Sea Monster of Theseus #RATE-EN081 is trending down: $20.83 today, down 8% in 30 days and 8% below its high of $22.67 (2026-09-16), the highest since we began tracking (2026-09-16), but near its low of $20.83 (2026-10-26). TCGplayer market price as of 2026-10-28, tracked daily since 2026-09-16. Other windows: down 4.5% over 7 days.

What is the highest price for Sea Monster of Theseus since TickerMint began tracking?

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TickerMint began tracking Yu-Gi-Oh prices on 2026-09-16, after Sea Monster of Theseus came out, so these are the highest and lowest prices since we began tracking (2026-09-16), not all-time records. In TickerMint's daily data (since September 2026), the TCGplayer market price for Sea Monster of Theseus [Unlimited] (all conditions) peaked at $22.67 (2026-09-16) and bottomed at $20.83 (2026-10-26).

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