The Pokemon TCG has released a number of expansions in recent years, and many of the cards have a surprising value
The most recent set, Obsidian Flames, for example, leaned so heavily on Charizard, that, despite having some other great cards, it struggled to take off, and Master Sets have been selling for under $500
A relatively simple prize at that time, the card is now worth more than $150,000 , and less than 11 exists in a PSA 10 condition
This rarity has made the set a favorite among high-end collectors
Their references range from the broad idea of the book to their personal collections, to on-site library visits, as well as a healthy dose of general internet image scouring