Its evolution into Gengar via trading added an interactive element that encouraged player cooperation and made Haunter a memorable part of the Pokmon experience
Its one of the standout Trainer cards from Twilight Masquerade, and it has the potential to run up plenty of resale value
Its called dusting
Still, over $22 for a card printed in 1999 is fairly impressive, and the overall popularity of the Pikachu evolution line the face of the entire Pokemon franchise means that Raichu, and its Fossil printing, will always be a hot ticket on the secondary market
Like most Pokmon cards, the value of Rowlet depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Hidden Fates Shiny Vault)
If a card has no symbol in that corner at all, skip to the no-symbol section