So you have chosen DEATH (mathandphysicsftw)

Although the law of one price holds for goods that are nearly uniform in characteristics and quality and easily traded in nearly perfectly competitive markets, many - if not most - goods are not like that. Goods of the same general type may be differentiated in important ways: a Lexus LS and a Ford Focus are both cars, yet they are very different cars, and there is no reason that their prices should be identical.