The mana value of the back face of a transforming double-faced permanent is the mana value of its front face
Like most Pokmon cards, the value of Charizard V 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 (SWSH Black Star Promos)
When a trading card game has been going on as long as the Pokmon Trading Card Game has, there's bound to be a ton of outdated or banned cards
Bringing in Ghost Vacuum out of the sideboard should help hedge against the more explosive plays from Cauldron, mind you
2000 Topps Pokemon TV Animation Series 3 Pop-Up Charizard #9 PSA 10 Recently Sold for $1,358 [Source] Although it looks like one of those early Japanese Pokemon cards from 1995, these cards are actually really cool The character can be popped out and made to stand up using the rest of the card to support it