Mastemon (BT3-090) sells for $1.41 on TCGplayer (market price, Oct 22, 2026). A Purple digimon card from BT0103v2 in the Digimon card game — rarity SR, cost 12.
$1.41TCGplayer market priceFrom $0.54 · 40 listings · as of Oct 22, 2026
Effect: [When Digivolving] Trash 1 card from the top of both players' security stacks. Then, play 1 purple or yellow Digimon card with a level of 4 or less from your trash without paying its memory cost.