Hello, everyone! I found this Call of Duty 7-in-1 anthology (CoF World at War, CoF Modern Warfare 4, CoF2 Holy War, CoF2 Soldier's Feat, CoF Secrets of the Reich, CoF Operation Abwehr, and CoF American Rush 2). Its shelf life is only 5 years, but this disc is at least 14 years old and still works! I was wondering how much it would sell for? I tried looking up the price online, but I haven't seen discs like this anywhere else. Or should I keep it and continue playing the games on it? (I've already played 5 of the 7 games on it.)