You will have to use/find proper URL of the marketplace on the amazon.com in the format, where in the URL of the martkeplace are this IDs "marketplaceID=" and "seller=", if these 2 parameters are not in the URL, the crawler will not save any data. You can use this crawler for amazon.com and amazon.de. You might need to use PROXIES for the Amazon, if you are going to go through bigger amount of pages. If you want to use ANTI-CAPTCHA and check for captcha controlling, you have to register at http://anti-captcha.com and copy the KEY to the key variable. PS:If the crawler hangs on the ajax request, give it a try after some time, amazon sometimes does not response, happened to me once.