For anyone looking for a link for Ians site where you can see the plugin in practice, visit here:
http://www.chinawholesalectronics.co...4201727016066/
Change the country in the right hand side bar to New Zealand and you will see the 'BUY NOW' affiliate button changes to a PayPal Buy Now button and *additionally* note that there is a markup added for his drop-shipping service of 25% (configurable in the plugin).