What digital products to sell ?

Hey everyone !

Imagine that you are in 2014 and you are about to become an Amazon Seller, what digital product would you sell, knowing has worked in the last decade ? I’m asking this because I plan to sell digital products in an underdeveloped marketplace pf a third world country and I thought selling the most profitable digital products that have worked on Amazon would be a good idea.

Has anyone had any success with digital products ? Ebooks, courses, guides ? I’m looking for evergreen digital products