Take it or leave it
要了就拿走，不要就算了

I will take it. How much?
我就买这个了，多少钱？
$60.
60美元。
I am sure you can do better than that.
我觉得你可以再便宜点。

Sorry, sir. It's the sale price.
抱歉，先生。已经在降价处理了。
Well, what about $70 with a scarf?
嗯，给你70美元再搭我条围巾怎么样？
It's my rock bottom price. Take it or leave it.
这已经是我能出的最低价了。要了就拿走，不要就算了。