用运费试算来试探客户，最简单的询盘回应。

最简单的询盘回应
Got your inquiry and will give you info very soon.
这种情况，对方看完后应该会等你进一步消息而不会回你什么信息。

用计算运费的理由，来看看对方反应
Could you please advise your shipping address because this will affect the cost of courier?
Thanks.

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直接拒绝无理的要求

Please send me some promotional samples.

Sorry We don't have such service for initial client. Thanks for this opportunity.

用运费估算来聊
For the shipping cost estimating purpose, May I know where they send to? Or I just give you a rough China price at this moment?