For example, this is, of course, one of the most delicious tricks in marketing, is to say something used to be higher, and suddenly it seems like a very good deal.
例如，当然了， 这是一个在市场营销中 非常常见的把戏， 告诉你一样东西曾经非常贵， 然后买下这个东西就显得很划算。