Retro 购物反刍
Retro shopping is to compare prices for an item after you've already purchased it.
“购物反刍”是在已经买下一件东西后又去比较价格的行为。
Example:
Carrie couldn't resist buying that Manolo Blahnik heels as soon as she saw it. After a little retro shopping, she was thrilled to realize she also got a great deal on it.
凯莉一眼看到那双马诺洛高跟鞋就忍不住把它买了下来。在进行了一番价格比对后，她惊喜地发现自己买得很值。