在英语中讨价还价可以使用以下几种表达方式：

询问价格范围

"What's your general price range？"

表达不满

"Hey, don't try to rip me off. I know what this is worth."

请求折扣

"Can you give me a little deal on this？"

"How about giving me a discount？"

询问最低价格

"Is that your best price？"

表达愿意放弃交易

"If the price is higher than that, we'd rather call the whole deal off."

表示满意

"It's a bargain."

使用这些表达时，请确保语气礼貌但坚定，以便在讨价还价的过程中获得更好的结果。