I checked the link but I'm trying to understand the process.
Does it work like this:
1) Ebay buyer clicks "Buy It Now" on my ebook.
2) Buyer pays via paypal
3) After successful payment, Paypal Ebay or Paypal (?) provides the "Web address of digital item": https://www.e-junkie.com/ecom/eb.php (as per the link you provided).
4) Buyer goes to the link and downloads the ebook
a) In #3, can the digital delivery address be reused by others (lets say buyer sends the link to his friends so they can download the file too) or does it somehow check to see if it is actually the buyer and if they have paid already?
b) To do this, do I just need the ejunkie shopping cart/delivery service, or do I need to use the e-junkie ebook store as well?
c) Does ejunkie also handle the emails that are automatically sent to the winners of the auctions?