Xbox 360 Wireless Controller
GameStop is a great place to go. They will take in trades so you can purchase more stuff! Wether that's games, posters, apparel or accessories for your console. I would highly recommend this store to everyone!
Bought a replacement wireless controller for my son and it works well. Still going strong after some very rough use by a 6 and 4 year old who can be... exuberant while playing games.