Another option for haggling might be "can you go any lower?" meaning 'can you lower the price at all?'

For regular stores with set prices, you could say: * Do you have any discounts? * Are there any discounts available? This is useful if, for example, the company gives discounts for students. Things are a little different if you are haggling. * Is that the best you can do? * What's the best price you can offer? Or, if you are willing to get a different, cheaper version of the product: * Do you anything cheaper?

Do you offer any discounts? Are there any sales going on? Are there any rebates that apply?