Shueisha’s Comic Fair “Natsukomi 2026” bonus “Metakira Cards” are being resold at high prices on domestic flea-market websites, while “ONE PIECE” cards are also being traded in large quantities at high prices of around 10,000 yen on the U.S. auction site “eBay.” When the editorial department checked on July 3, it found that one listing alone had sold 962 cards. Although prices are gradually declining, demand from overseas collectors may also be behind the