Most Expensive Grand Master Rare Cards From Yu Gi Oh! LIMIT OVER COLLECTION THE HEROES , here are the Top 10 most expensive cards when they appear as Grand Master Rare (Serial Numbered). Yu Gi Oh! TCG: 10 Most Valuable Ultimate Rare Cards Here are the most valuable Ultimate Rare cards in Yu Gi Oh! More in the comments! Which Coin Master cards are rare? YuGiOh! Single Cards:: Unicorn Cards YuGiOh!, Pokemon, Digimon and MTG TCG Cards for Players and Collectors.