This is the 9944th most frequent Japanese word.
買い替え
Replacing a purchase with a new one.
買い替え is used to inquire about the best options for purchasing a new item to replace an existing one.
テレビの買い替えには何が最適か教えてください。
What is optimal for replacing my television?
買い替え is used here to describe the act of purchasing something new as a replacement for an old item.
古い冷蔵庫を買い替えました。
I replaced my old refrigerator.
買い替え in this sentence conveys the idea of evaluating options for a new purchase to replace a problematic item.