您可以使用Ebay和Amazon API。如果您查看文档，您将看到有些搜索功能可用。

You can use Ebay and Amazon APIs. If you check the documentation you will see that some search functions are available there.

Ebay的PHP和Javascript示例查找教程：

Ebay's finding tutorial with PHP and Javascript examples:

http://developer.ebay.com/Devzone/finding/HowTo/index.html

以及亚马逊的API参考

And Amazon's API reference

http://docs.aws.amazon.com/AWSECommerceService/latest/DG/CHAP_ApiReference.html