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。