Sea Monster of Theseus 2017 Mega-Tin Mega Pack Secret Rare Yu-Gi-Oh! card — value and price

Sea Monster of Theseus

2017 Mega-Tin Mega Pack · Secret Rare
Yu-Gi-Oh! ygo:96334243 TCGplayer + Cardmarket + eBay
Fair market value
$17.70
Consensus of 3 market price guides. Typical $12.78 – $22.76.
▼ 24% · 32d
Sources: TCGplayer + Cardmarket + eBay · Near Mint, raw
Optimal buy
$15.91
Never pay above $16.89
Optimal sell
$18.90
Never sell below $18.06
Buy this card · aim to pay under $16.89
Find on eBay → TCGplayer → Buy on Amazon → Graded (PSA 10) →
When it arrives: a penny sleeve + toploader is all it takes to keep it Near Mint.
Penny sleevesToploaders

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Selling this card
Optimal sell $18.90 · never below $18.06. Value your copy for the live net-after-fees calculator.
Where to sell
eBay~13.25% + $0.30Largest audience; on any listing use “Sell one like this” to prefill yours.TCGplayer~10–11%Best for singles; buyers expect competitive, data-driven pricing.Whatnot~8% + paymentLive-auction app; strong for breaks, lots, and fast sales.
Shipping & protection supplies
Sleeve + toploader in a team bag, taped inside a bubble mailer, shipped with tracking.
Penny sleevesToploadersTeam bagsBubble mailersPainter’s tape
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Common questions
How much is Sea Monster of Theseus worth?

Sea Monster of Theseus from 2017 Mega-Tin Mega Pack has a fair market value of about $17.70 (Near Mint, raw), based on a consensus of current market price guides.

What is the best price to sell Sea Monster of Theseus?

List around $18.90 to clear without leaving money on the table; that nets about $15.04 after fees and shipping.

What should I pay to buy Sea Monster of Theseus?

A disciplined buy target is about $15.91 — a discount to fair value that keeps an edge. Aim not to pay above $16.89.

Where can I buy Sea Monster of Theseus?

Sea Monster of Theseus is sold on eBay, TCGplayer, and Amazon. Compare live listings against the fair value of $17.70 and aim to pay under $16.89 — SplitShot links you straight to current listings at each marketplace.

Is now a good time to buy Sea Monster of Theseus?

Sea Monster of Theseus is trending falling ~6% (7d vs 30d) lately. A disciplined entry is under $16.89; paying near or below $15.91 keeps a margin of safety versus the $17.70 fair value.

Estimate for guidance, not an appraisal. Value your exact copy →