I can see you're using Magento. We do currently have free trial of Amazon addon for PrestaShop, but it is not available for Magento yet. As soon as beta testing is finished for PrestaShop, it will be added to all Store Manager solutions including Magento.
We can comment this post once it is available.
Dec 08, 2014
We are using Presta now. Can we try Amazon Integration for free?
Dec 09, 2014
Currently the addon is at the beta testing stage and not available for sale.
We've created a trial license of the beta version for you and sent it via e-mail.