Mitch Keller [Aqua Rainbow Foil] is a card from the 2025 Topps baseball set, categorized as an Unknown rarity (card #108). Currently valued at $1.75, this card appeals to collectors seeking to enhance their sets with unique parallels. As a foil variant, it offers distinct visual attributes that can attract attention in the market. Its pricing reflects both demand and the ongoing interest in Keller's performance as a player.