Sea Monster of Theseus Raging Tempest #RATE-EN081
Confidence medium · estimate, not an appraisal · How we price →
Sea Monster of Theseus is a Secret Rare Yu-Gi-Oh! card from Raging Tempest (#RATE-EN081). Its current blended market value is $21.43 ungraded, with a PSA 10 worth around $218. Prices update from real market data.
| Grade | Relative value | Price |
|---|---|---|
| PSA 10 | $218$218–$218 | |
| PSA 9 | $108$108–$108 |
What this price is based on
Medium confidence4 sales in 90 days — enough for a guide, not a guarantee.
Recent Raw sales
- Jul 10, 2026eBay — Yugioh Sea Monster of Theseus RATE-EN081 Secret Rare 1st Edition NMNM1st Edition$13.75
- Jun 8, 2026eBay — Sea Monster of Theseus RATE-EN081 Secret Rare 1st Edition NM/M YugiohNM1st Edition$30.27
- May 31, 2026eBay — Yugioh Sea Monster Of Theseus (RATE-EN081) 1st Ed. Secret Rare1st Edition$37.50
- May 30, 2026eBay — Sea Monster of Theseus RATE-EN081 Secret Rare NM/M YugiohNM$28.82
From 4 completed sales recorded between May 30, 2026 and Jul 10, 2026. Sold prices only — asking prices are never counted.
Grade it or not
Not enough graded evidence yet — 0 graded sales recorded.
✨ Is it worth it?
An AI market read of this card — value, momentum, grading economics, liquidity. It lays out the data; you decide.
Price history · Raw
Card details
- Number
- #RATE-EN081
- Rarity
- Secret Rare
- Game
- Yu-Gi-Oh!
More from Raging Tempest
Where to buy & check prices
Frequently asked questions
How much is Sea Monster of Theseus worth?
Sea Monster of Theseus (Raging Tempest #RATE-EN081) is worth around $21.43 ungraded, or about $218 in PSA 10, based on live Yu-Gi-Oh! market data.
What is a PSA 10 Sea Monster of Theseus worth?
A PSA 10 Sea Monster of Theseus sells for around $218, roughly 10× the ungraded price.
Where can I buy Sea Monster of Theseus?
You can buy Sea Monster of Theseus on TCGplayer, Cardmarket and eBay — see the live listings on this page. Always compare against the blended market value first.
What rarity is Sea Monster of Theseus?
Sea Monster of Theseus is a Secret Rare Yu-Gi-Oh! card from the Raging Tempest set.
Cite & embed this card
Free to use with attribution to CardTrack.
Sea Monster of Theseus (Raging Tempest #RATE-EN081) — Yu-Gi-Oh! market value $21.43, PSA 10 $218.49. Source: CardTrack, https://cardtrack.com/yugioh/card/raging-tempest/sea-monster-of-theseus-rate-en081<iframe src="https://cardtrack.com/embed/card?id=yugioh-raging-tempest-sea-monster-of-theseus-secret-rare" width="100%" height="160" style="border:0;max-width:460px" title="Sea Monster of Theseus price — CardTrack" loading="lazy"></iframe>
<p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>