It's too expensive.

太贵了。

The price is too high.

价格太贵了。

Do you have any cheaper ones?

有没有便宜点儿的？

Can you give me a discount if I buy two of this?

如果我买2个能打折吗？

That's a bit more than I wanted to pay.

这超出了我的心里价位。

Can you knock off 10%?

可以打九折吗？

Fifty yuan, I'll take it.

50元，我就买了。

I can't afford the price.

那个价格我承担不起。