On topic, maybe its a rubbish game that nobody wants or a game that everyone with a ps3 already owns. It came free with the machine so just flip it upside down and use it as a coaster. Then when people come over you can say we so l33t that we use blurays as coasters
before swapping the game at BT games make sure there is nothing on the back that says ti came bundled with the console and cannot be sold seperately. I had a PS3 that came with Fifa12 and had that on and BT games would not accept it which makes sense though. eventually sold the console with it.