When you're tired of looking and chatting, take a rest, and go to the next yard sale. It's best to shop around before buying. Rarely will you come across someone holding a yard sale whose attitude becomes chilly when you don't buy.
看累了聊厭了，休息一下，再到下一家，所謂「貨比三家不吃虧」，而且古有名訓：「買賣不成仁義在」，很少碰到不買就給臉色看的。