for a song
以非常廉價的價格，或以很低的代價
口語·表達低價購買
英文釋義
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.
典故來源
源自16世紀英國街頭小販以極低價格出售歌謠單頁，后引申為極其廉價。