Is that your last price?

那是你的最低价吗？

Is that your last price?

这是你的最低价了吗？

No, last price already.

不，那已经是底价了。

Sorry, she said that's their last price.

她说这是他们的最低价。

The salesgirl said that's their last price.

店员说这是他们的最低价。