救命啊！请教专业外贸价格谈判高手，我这个邮件该怎么写?

你对他客户说，也许别人的价钱是比我们的低，但我们的产品质量你是知道的，正所谓一分价钱一分货，我保证我们的产品不会出现任何质量上的问题，如果你使用后感觉我们的产品不是很理想或不是我们所说的这样，你可以和我们无条件退货。仅供参考

Dear: Mr. XX
Good afternoon, Glad to contact you!
Firstly, we really appreciate your reply very much. And we all take it seriously. We internally discussed this issue carefully, but frankly speaking, we have already made every effort and that's the best price we can offer now.
But we can guarantee that we're providing the best products with high quanlity, application and service. And we sincerely wish to have your favor, thank you for your kindly understanding!
Sincerely
Yours
XXXX
其实主要就是解释清楚你们已经认真考虑过他们的意见，但是确实没有办法再降价了，但是你们保证你们的产品质量和服务绝对好，希望能够得到他的理解！
说实话，有些外国人真的很可恨，TN的一直觉得中国的东西就应该便宜，好像不便宜卖给他就不行的德行！别太惯着这帮人了！能成就成，不能成也别亏了！