If this causes the greatest power among creatures you control to change (for example, if you control a creature with "This creature's power is equal to the number of cards in your hand"), that new power will be used to determine the cost reduction
Like most Magic: The Gathering cards, the value of Intrepid Rabbit 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 (Bloomburrow Tokens)
High-Society Hunter High-Society Hunter is a really strong card draw ability and one that almost all black decks want
Bulbasaur #133 (Pokemon Mega Evolution | Pokemon Cards) prices are based on the historic sales
If youd put that money into a PSA 9 Charizard instead, youd have $5,500
they are reliant that the amount of people into pokemon doubles, triples, or even quadruples by then, which isnt feasible