Buy 2 pre-owned games get 2 free at GameStop (old consoles)

This is the last week of the GameStop power saver sale, and in addition to all of those discounts, you can also buy two pre-owned PlayStation 2, Gamecube, or Gameboy Advance games and get 2 other ones free. If there are some classic games from the last generation that you missed out on, or maybe you lost a disc but still have your save data, now's the time to restock.