Here is another nightmare I don't like to think about... When the game is not sealed - NO DEAL.
I hate that, I'm paying for a brand new game, that means in its box, sealed and 100% new as it left the factory.
Last time I tried to buy a game from Tesco (back in my Xbox 360 days), I inspected several discs of the same game and eventually gave up and went elsewhere, every one of them had scratches on it, not to mention some mutton brained numpty's fingerprints all over them.
If its been opened, its second hand.