1. Your counter-offer is much too low, especially considering the small amount of your order.

就定量来看，贵方还盘太低了。

2. Our price is fixed on a reasonable level.

我方基于合理水平确定报价。

3. The price has been reduced to the limit.

该报价已降到最低限。

4. There is little scope for further reducing the price.

已经没有再降价的余地了。

5. Considerable quantities have been sold at this level, any further reduction is out of the question.

以此价格卖出去的货一直很多，不可能再进一步降价。