Like most Pokmon cards, the value of Primeape 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 (FireRed & LeafGreen)
As mentioned, those who have been playing MTG for a while may find this mechanic rather familiar
The Guinness World Record for the most expensive Pokmon card ever sold
Weezing is a low-cost Pokemon that can poison opponents while we set up Gengar ex, but if you bring him along, its worth swapping one of your X Speed Item Cards for Koga if you can
After selling out in a matter of hours, prices exploded once they reached players hands
Wurmcoil Engine is a great card packed full of value, and sees play in a lot of formats