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"Buy one, get one free" or "two for the price of one" is a common form of.Economisthas argued that the success of this promotion lies in the fact that the price actually considers the fact that two items are being sold. The price of "one" is somewhat nominal and is typically raised when used as part of a buy one get one free deal. Whilst the cost per item is proportionately cheaper than if bought on its own, it is not actually half price.