Professor Elm - 3 from the Best of Promos set is a Promo rarity Reverse Holofoil card, numbered #003/009. Currently valued at $22.91, it has seen a significant increase of 43.4% in the past 30 days, reflecting its growing popularity among collectors. As a pivotal character in the Pokémon game, this card appeals to both players and enthusiasts, marking its importance in the trading card market.