I just looked up competitive Magic the Gathering decks, and of the top 8, 3 of them cost $500.
I have spent a good bit less than that, and I have essentially every card in the game. So I don't have one deck, I have all of them possible that are used, have yet to be used, out dated, or in meta. Nothing but time, skill, and a little luck seperates my ability to play Tempo Mage or Freeze Mage, Face Hunter or Midrange Hunter, Control Warrior or Patron, Handlock or Demon Lock or Zoo, Oil Rogue, Ramp or Combo Druid, the list goes on and on.
This game rocks.