Question

我的客户说我的价格高了。我想回复，为了表示我们合作的诚意，给他降10%，专业一点的外贸语言怎么翻译

Answer 1

你随便就降价？？
太不专业了！
很少有客户不抱怨价格高的

如果你在核算的时候真的给他核了很高的价格，可以这么说：
Dear Mr./Mrs...
thanks for your suggestion for the price.
after checking with our technoligy dep., we find it is possible to make10% off from the present price, and we hope the deduction of price will enhance our cooperation in the future.
we really do hope to establish a long term business with your company.

thanks and best regards,
.....