尼日尼亚一大客户要免费样品（价值最少的也要300美金）

尼日尼亚一大客户要免费样品（价值最少的也要300美金），我邮件回复如下如何？ps：邮件还未发送. Dear purchase manager , Thanks for your reply . If we send a free sample to you ,what if other customers ask us for that like you ? From your website , I know you are ery big company in Nigeria ,you must be high-level administration in your company .But ,to be frankly ,from your email ,it's hard for me to believe this ! We never met a customer who asked us for free sample like you ,so i he to believe that you are not really want to buy our incubator ! So i will not waste every minute writing to you ! Thanks vivian