紧急求助： 美国客户给我底价，我方不能接受啊！

我方：深圳一家外贸公司 客户：美国人 海运：深圳到费城 数量：1000pcs 我方报价： 6000美元（CIF价格） 客户今天邮件说想给我方一个合作的机会，还价： 4800美元（CIF价格） PS：这笔单我们外贸公司的成本在4800-5000美元之间 谈判两个多月，挣客户1000美元是否合理呢？ 先看今天早上客户的回复： Thanks for your response.??Sorry for asking the same question again, but we needed to be 100% clear with everyone's estimates before we can make a decision. I will tell you that you he been underbid, however, you he been very helpful and I am willing to give you an opportunity to match your competitor's price as I feel we he already established a good business relationship and we aren't too far away on price. I was quoted $4.80 per piece plus shipping. We will pick up the shipments ourselves in Philadelphia. If you are able to match this price, we will need samples sent (one textured/smooth, the other smooth/smooth) Your assistance is appreciated. 1：我方是否要降价，如果降价降到多少比较合理？ 2：我方保持原价（6000美元）不变，这是我的观点。 大家有什么好的法吗？灰常感谢！