shop around
phrasal verb with shop verb uk/ʃɒp/ us/ʃɑːp/ -pp-
货比三家，逐店比较后选购
to compare the price and quality of the same or a similar object in different shops before you decide which one to buy
When you're buying a flight, you should always shop around for the best deal. 买机票时，你得多询问几个售票处，以便买到最便宜的票。