Pokmon cards become valuable due to factors like rarity, condition (graded by PSA), and historical significance, such as first-edition or promo cards
The prize cards, which auctioneer Fanatics Collect (formerly PWCC) states were given to the top three players from each region, all featured Exeggutor - a reference to the tournament's location
While not the most flash of those cards, those of the uncommon rarity have certainly had their impact on the game
You need a specific objective or a certain board state before you even consider investing resources to crack open the battle (apart from discarding a card, paying three mana, and tapping this thing)
#113 $0.92 Metal Energy #98 $0.65 Pikachu #35 $0.64 Fairy Energy #99 $0.50 Uncommon Double Colorless Energy #90 $0.39 Uncommon Charizard Spirit Link #75 $0.29 Fire Energy #92 $0.29 Psychic Energy #95 $0.29 Uncommon Machoke #58 $0.28 Rare Dewgong #29 $0.27 Rare Arcanine #18 $0.25 Water Energy #93 $0.25 Vulpix #14 $0.24 Uncommon Venusaur Spirit Link #89 $0.24 Rare Beedrill #7 $0.23 Uncommon Misty's Determination #80 $0.23