Old Video Games (gameboy, gamecube, Nintendo, etc) (Boughton Vale CV23)

I am looking for games for old retro gaming consoles. My friend has sadly passed away and we are trying to sell his old consoles to raise money for the Cystic Fibrosis Trust. Unforunately we do not have the games to be able to test the consoles. If you have any old games, in any condition they would be very much appreciated.