Green ramp is a potent cube archetype
While you might not think it, Carbink BREAKs measly 20 damage attack is something to worry about, because between Strong Energy, Fighting Stadium, Muscle Band, and the new Regirock-EX, it will be hitting for 40/60/80/90+ every turn, which can soften up some Pokemon for your main attackers to finish off, or even take some KOs if they cant get around Safeguard
Rare tournament cards (e.g., Trophy Pikachu, Masters Key) have shown consistent price growth in the last five years
This was more than two years after the release of the first card to create a zombie token: Feast or Famine, a "choose one" spell, whose token-creating half is the significantly less powerful mode of the two
These stores often specialize in collectibles and have staff who are knowledgeable about the value of rare cards