dragon sleeves cards Red and Blue Dragons Card – Paola's Pixels free as the sleeves they are forged onto Dragon Shield - Dual Matte

Popular sets like OP-01 and OP-05 command multiples of their original price

R Rare Earthbound Prisoner Ground Keeper X DARK Level 1 [ FiendTunerEffect ] ATK 300 DEF 300 If this card is Normal or Special Summoned: You can Special Summon 1 Level 5 or lower "Earthbound" monster from your Deck or GY, except "Earthbound Prisoner Ground Keeper", also you cannot Special Summon from the Extra Deck for the rest of this turn, except Fusion or Synchro Monsters

But the Card Pro is a touch clearer

Expect to pay into the hundreds or even thousands for the most expensive cards, so definitely ensure youre buying through a legitimate trader or auction house to guarantee your money is well spent