1. That's great! 很好!
Fantastic!/I'm glad to hear that.
2. How much are you selling it for? 这台的价格是多少?问价钱的说法还有:
What's the price for it?
How much does it cost?
3. You can't go down on the price. 意思是问可以再价钱可以再少一点吗?讨价还价的说法还有:
Could you lower the price some?
I would buy it if the price was lowered.
4. By how much? 一般售货员问还价的买主,意思是价钱降到多少合适?
How much are you talking?
How much lower?