for a song
以非常廉價的价格，或以很低的代价
口语·表达低价购买
英文释义
to be sold at a very low or inexpensive price
例句
I got this vintage guitar for a song at the garage sale yesterday.
典故来源
源自16世纪英国街头小贩以极低价格出售歌谣单页，后引申为极其廉价。