请哪位高手帮我写篇商务英语，谢谢~急急急~~~~~~~~~~~~~

楼下的，不是要翻译啦。。。
楼主，我提供个大概给你，具体数值和细节你自己补充吧。
Mr johnoson,
thank you for your latter/fax on (date),we appreciate your attention to this quotation and sorry to learn that you think it is on a high side.
we would like to explan why we quotate at XX(price) for your reference. (之后罗列产品优势，最好是能区别于其他供应商的优势，包括设计或者品牌优势，能委婉暗示他的报价不符合市场价最好)as a result, you will see our quotation is fair because of its quality.
as you are one of the most important clients and we have cooperate successfully several times. we can make a commission on the transport terms.(可以根据你们能接受的一些其他条款做稍微让步，例如运输啊之类的细节)
hope you can accept our explaination and make a win-win way for a bright business future for both of us.

差不多就是四段论，既点明了不愿接受他的报价，也不是很生硬。写的仓促，有什么问题麻烦留言指教下，谢谢。

Johnson先生，一个美国商人，发了要求麦杆编织物品的询盘。
我们给了他那种在美国很流行的麦杆编织蓝、编织碟的报盘。
他回盘要求一个很低的价格。
我们坚持我们的报价，拒绝了他的佣金（要求），最后达成了交易 。

一楼的可以