POP cards a mildly rare. They were mass produced to be handed out to leagues, but only produced for a limited time. Most of the cards go for $1-2, but a few can go for more. The cards that go for more are the Ultra Rares and the Legendary Pokemon cards. Most of these don't break $7, but a few can like Armaldo ex, Tyranitar ex, sometimes Celebi ex, and Umbreon & Espeon Gold Star (which go for $50+).