I am not sure if I understand the question entirely so please excuse me if my response is not accurate.
If you add an ebook in E-junkie, to sell on your website, E-junkie will provide you the button code for doing so. That button can be used to sell any number of copies of the ebook and it can be placed on any number of websites.
If for any reason, you want to add the same ebook again in E-junkie Seller Admin, you will get the new button code and that button code will sell that particular product. You can have exactly the same name, the products will be differentiated by unique item numbers (either
entered by you or generated by our system, but unique nonetheless).
Now, if you are selling the product on eBay, we recognize it by matching the item name, so if you have 2 products in E-junkie seller admin that match the product name in your eBay listing, then either one of them can be delivered.
Our system does not charge you based on how many "sales" you have, but on how many products you have add in our system. So if you have 20 products and sell a 100 of each, our system will still charge for 20 products.