1. Your bid is obviously out of line with the price ruling in the present market.
贵方还价明显与当前行市不符。
2. We regret that we cannot book your order according to your counter-offer.
很遗憾,我方不能按照贵方还盘接受订货。
3. We are not in a position to entertain business at your price, since it is far below our cost price.
由于贵方出价远低于我方成本,我方无法接受订货。
4. There is still much scope for you to reduce the price, I think.
我认为,贵方还有降价的余地。
5. If you think that our offer is out of the question, you may try elsewhere.
如果贵方无法接受我方报盘,可以去别处试试。