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Sea Monster of Theseus
Yu-Gi-Oh · Secret Rare

Sea Monster of Theseus

$0.93
-$5.16-84.7% · 30D
Live TCGplayer market price
Where these prices come from

Yu-Gi-Oh prices on TCGIndex are TCGplayer market prices (the US market), in US dollars. Another currency is a conversion from USD at the day's rate, not a European market price. We do not use Cardmarket or Cardtrader prices for Yu-Gi-Oh.

Confidence
40/100
Building
7-Day Change
-19.1%
vs last week
Market Trend
Stable
TCGplayer price
Buy

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Before the price moves

We find the Yu-Gi-Oh cards about to rise.

Every night the model scores every Yu-Gi-Oh! card on the market. Every morning at 07:30 UTC it publishes the one most likely to gain 10% within 30 days, with its entry price and the reasons, then scores it in public.

Hit +10%
54%
Average return, day 30
+16.8%
Picks scored
147

Last 90 days, live picks only, losses included.

See today’s Yu-Gi-Oh! pick

Published this morning, public in 14 days. Full record

Price & Volume
Market price Sales volume
Jan 2026 – today
Price by Condition · 5
Anchored to market price · condition spread from TCGplayer
Near Mint
1st Edition · English
$0.93
-5.1%
Lightly Played
1st Edition · English
$5.58
-11.7%
Moderately Played
1st Edition · English
$12.68
-2.5%
Heavily Played
1st Edition · English
$9.61
-13.1%
Damaged
1st Edition · English
$10.73
+1.0%

Sea Monster of Theseus price history

Near Mint market price on the dates below, from TCGIndex's daily record (215 days tracked). High $26.19 on May 2026, low $0.93 on Nov 2026.

WhenPricevs today
Today$0.93
7 days ago$1.15-19.1%
30 days ago$6.09-84.7%
90 days ago$20.75-95.5%
6 months ago$18.38-94.9%
MonthMonth-end price
Jan 2026$3.14
Feb 2026$3.14
Mar 2026$4.09
Apr 2026$17.36
May 2026$22.21
Jun 2026$25.35
Jul 2026$20.56
Aug 2026$13.49
Sep 2026$7.83
Oct 2026$1.27
Nov 2026$0.93

Sea Monster of Theseus FAQ

How much is Sea Monster of Theseus worth right now?
Sea Monster of Theseus from 2017 Mega-Tins Mega Pack is trading around $0.93 raw (ungraded) on the secondary market. TCGIndex refreshes this price every day.
Is Sea Monster of Theseus going up or down?
Sea Monster of Theseus is down 84.7% over 30 days, down 19.1% over 7 days. The full price history is on this page.
Is Sea Monster of Theseus a good investment?
TCGIndex doesn't give financial advice, but here's the data worth knowing: it sits around $0.93, down 84.7% over the last 30 days, with high volatility. Prices can move fast, so look at the trend and your own timeframe before you buy. TCGIndex publishes one Yu-Gi-Oh pick every morning; each pick becomes public 14 days later and is scored at day 30.

Other printings of Sea Monster of Theseus

Sea Monster of Theseus has 2 other priced printings, from $0.20 to $19.87. Cheapest first.