Cheap is not always expensive - often it is just that, cheap. That phrase is a marketing gimmick by consumerism when it is up to no good. Besides, cheap and expensive are all relative.
Case in point. Many years ago when I was organising my wedding, the decoration man discouraged me from getting flowers from the north side of Moi Avenue. "If you insist, I will source from uptown." He answered me when I suggested someone who had been recommended by a friend. "But those flowers will cost you triple the amount, and they will be no different from the ones I get downtown."