I mean that game u got for a fiver in the bottom of the second hand bin that actually turned out to be the best game u've ever played.
Or, alternatively, that time u found a limited/special edition of some big title mis-priced, and no one noticed when u bought it for peanuts.
Or, alternatively, that time u found a limited/special edition of some big title mis-priced, and no one noticed when u bought it for peanuts.