this is a cartridge that u put in your DS then u put the ds game in the Action Replay. If there are cheats there will be a menu and u could chose wich cheats u want. its really cool.
idk. wut ever its worth TO YOu. always remember that. It doesnt matter how much it is in value. What ever u think its worth u bid. And if it is not worth it then dont bid. Its your choice