Sea Monster of Theseus 2017 Mega-Tins Mega Pack #MP17-EN231

65 sales in 90 days, closely clustered.

What each version actually sells for

Every figure is the median of real completed sales whose listing claimed that printing and condition — not a percentage of the headline price. A dash means we haven't seen enough sales of that exact version to publish one.

Recent Raw sales

• Aug 7, 2026eBay — Yugioh Sea Monster of Theseus MP17-EN231 Secret Rare 1st Ed NMNM1st Edition$19.99
• Aug 6, 2026eBay — Sea Monster of Theseus MP17-EN231 1st Edition Secret Rare LPLP1st Edition$16.50
• Aug 5, 2026eBay — Sea Monster of Theseus 1st Ed Secret Rare 2017 Mega-Tins Mega Pack MP17-EN231 LPLP1st Edition$11.28
• Aug 2, 2026eBay — Sea Monster of Theseus MP17-EN231 1st Edition Secret Rare LPLP1st Edition$16.50
• Jul 31, 2026eBay — Sea Monster of Theseus MP17-EN231 2017 Mega-Tins Mega Pack 1st Edition Secret LPLP1st Edition$14.00
• Jul 25, 2026eBay — Yu-Gi-Oh! Sea Monster of Theseus MP17-EN231 Secret Rare 1st Edition NMNM1st Edition$15.99
• Jul 18, 2026eBay — Yugioh Sea Monster of Theseus MP17-EN231 1ST ED NM SECRETNM1st Edition$18.00
• Jul 13, 2026eBay — YUGIOH SEA MONSTER OF THESEUS SECRET RARE 1ST EXC MP17-EN231$26.97

From 88 completed sales recorded between Jan 15, 2026 and Aug 7, 2026. Sold prices only — asking prices are never counted. The median above is computed over the 10 sales of the printing this page lists; 1st Edition and Shadowless copies are real sales of a different card and are shown separately rather than mixed in. The range is wide because these sales span different printings and conditions — 1st Edition, Shadowless and Unlimited copies all carry this card's name, and they trade at very different levels. Each sale above is labelled with what its listing claimed, so you can see which ones describe the same object. Treat the median as the typical copy, not the range.