Wait for stable market trends
Understanding Pokmon card rarity symbols Rarity symbols appear at the bottom corner of each card: a black circle indicates Common, a black diamond represents Uncommon, and a black star denotes Rare cards
Magic: The GatheringFinal Fantasy blew that out of the water, earning in one day what The Lord of the Rings earned in six months
Llanowar Elves Rarity: Common TYPE: Creature SUBTYPE: Elf Druid CMC: 1 Mana cost: USD: $0.38 EUR: 0.23 TIX: 0.03 EDHREC RANK: 59 (1/1) : Add
As for all the eras, the Charizard version is the most valuable, both to do with rarity and the fact that the holofoil makes it easier to spot imperfections
However, if you use Twin, Spellskite will take away the Twin itself, so it's just tears