The images included with the Sitefinity Template Builder are only for presentation and preview purposes. Some of the high resolution files are available for free and you can use them for your website template without purchasing a license. If you would like to use the paid images for your website template, you will need to purchase a separate license from iStockphoto. The price of the images varies depending on the size of the photo. Direct links for purchasing the images from iStockphoto are provided in the exported file.