gc-forever - Gamecube/Wii Forums

I have recently come across a version of madden 06 that is still sealed and packed in a large GameCube branded “Anti-theft device”. I obviously know the purpose of this large fairly obnoxious packaging is to make it harder to run out of a store with a sealed copy of a game. However I am wondering if anyone knows more about this? Like maybe what store it came from or the rarity of something still in this packaging? Any additional information helps because i know pretty much nothing about it and have had trouble finding anything similar online.