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

Sea Monster of Theseus

$21.35
+$0.63+3.0% · 30D
Live TCGplayer market price
Confidence
62/100
Reliable
7-Day Change
+1.2%
vs last week
Market Trend
Rising
TCGplayer price
Buy
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
$21.35
+1.2%
Lightly Played
1st Edition · English
$20.74
-3.2%
Moderately Played
1st Edition · English
$13.29
+0.8%
Heavily Played
1st Edition · English
$10.72
+8.0%
Damaged
1st Edition · English
$7.73
+8.6%

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 $21.35 on the secondary market. TCGIndex refreshes this price every day.
Is Sea Monster of Theseus going up or down?
Sea Monster of Theseus is up +3.0% over 30 days, up +1.2% over 7 days, and the trend currently reads up. 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 $21.35, up +3.0% over the last 30 days, with low volatility. Prices can move fast, so look at the trend and your own timeframe before you buy.