Quick answer: The rarest, most valuable Pokemon Gold cards come from the Gold Star Espeon and Umbreon Series 5 Pokemon card sets, as well as the Gold Star Holo card edition. Collectors can buy Espeon or Umbreon cards individually, but when sold together, the price can go as high as 30,000 USD.

Gold cards are rare, though some cards are more rare than others. Compared to regular Pokémon cards, gold holographic cards are very rare. The odds of getting a gold card in an expansion pack is about 1 in 100. Every Pokémon card has a symbol on the bottom that indicates its rarity, so some gold cars are more rare than others.

Gold cards fall into the ‘secret rare’ category. Each set has a numbered setlist, and secret cards surpass that number. The first appearance of gold cards was part of the Black & White- Legendary Treasures set from 2013. This set contained two gold cards as secret rare cards, Reshiram 114/113, and Zekrom 115/113.