Like most Pokmon cards, the value of Koffing 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 (Call of Legends)
Once a card is slotted into a sleeve, its protected from all the forms of wear discussed above
Ex Dragon Frontiers Holo Gold Star Charizard The Ex Dragon Frontiers Holo Charizard Gold Star was a rare Pokmon card, even when it was first printed in 2006
Iconic Cards Shadows over Innistrad: Eldritch Moon Emrakul, the Promised End, which proved to be too good for Standard
Owner Ronnie Hackett was not at the business during the robbery, but he stated his manager was present and nearly encountered the suspects as she walked down the stairs
A different deck could focus on a Stage 2 Pokmon that takes time to set up but becomes extremely difficult to remove