Key drivers include: Playability (Commander or Standard demand) Rarity and Frame (borderless, ripple foil) Supply from drafts/pre-releases (how many copies entered the market) Secondary market listing (TCGplayer market prices) After, you can prioritise which cards to keep, sell or trade based on how these factors affect your expected value and deck plans
This Gengar ex is an excellent example of the then-new galaxy holo foil treatment, which is far less common these days, in the face of other, arguably more spectacular and textured card treatments
It provides endless value in your decks that play with +1/+1 counters, like many of the recent Humans decks and those that have Gavony Township
When playing this I always just find myself thinking I could just pay a little more mana and have a removal spell that deals with any kind of permanent
#8 Clefairy Illustration Rare Clefairy ME03: Perfect Order Illustration Rare Market Value Loading
Maxx C can be activated during either players turn in Yu-Gi-Oh
