1. We regret to say that your offer is not in the least encouraging.

很遗憾，贵方报价毫无诱人之处。

2. We regret that it is impossible for us to entertain the bid.

很遗憾，我方无法接受该报价。

3. We regret to say that your price is on the high side. We do not think there is any possibility of business unless you cut your price by 20%.

很遗憾，贵方价格太高。我方认为没有成交的可能性，除非贵方降价20%。

4. We feel that our offer will give you full satisfaction and hope to receive a favorable reply from you soon.

我方报价会令贵方十分满意，期待很快收到贵方的好消息。

5. There’s little likelihood of concluding business at your price.

几乎不可能以贵方价格达成交易。