Just a heads up that this plugin DOES NOT track affiliate commissions even though they make out it does. The plugin only links to the ebay page and does not include any affiliate tracking id or anything else to make it a valid affiliate link. I have no idea why they are making out it does when it does not, they get you to enter your Ebay affiliate ID but it does absolutely nothing.
Another issue with this plugin is that you have only one setting to change how many products you want to display. If you try to change it per page in the shortcode it does nothing.
I will be looking for a proper Ebay affiliate plugin, this one does not work at all.