The Pokémon CoroCoro Supplement Old Back cards from 1996 to 2001 are highly sought after by collectors, representing a pivotal era in the franchise's history when Pokémon transcended from a video game phenomenon to a cultural staple.

This complete set carries significant appeal due to its limited print run and the nostalgia associated with the early days of Pokémon's rise, particularly among fans of the CoroCoro magazine which often featured exclusive content and cards.

Despite the signs of aging noted in the condition report, vintage items like these maintain strong demand in the collector market, particularly when sourced directly from Japan, where preservation practices often yield better quality over time.

Pricing at ¥660,000 reflects the rarity and enduring popularity of these cards, aligning with established market trends for well-preserved vintage Pokémon collectibles.