This set of six unsealed Pokémon promo cards from the 2002 JR Happy Adventure Rally holds substantial appeal for collectors due to the event's limited nature and the iconic characters featured, including Mewtwo and Pikachu.

Released during a peak period for the Pokémon franchise, these cards are part of the Japanese-exclusive e-series, making them particularly sought after for their rarity and historical significance.

The cards' excellent condition, preserved in original plastic sleeves, enhances their collectability, reflecting the careful storage practices commonly found among Japanese collectors.

In the current market, the price of ¥699,000 aligns with the demand for vintage Pokémon memorabilia, especially for items that originate directly from Japan.