What are the prices compared to Amazon's? Books are generally cheaper here in the subcontinent. I did a price comparison of 30 books and found out that Kindle editions cost significantly lesser than Kobo. And Kobo editions cost slightly higher than paperbacks.

The total amount for these 30 randomly selected books came to: Paperback price: ₹13,017 (~$149) Kobo price: ₹13,252 (~$152) Kindle price: ₹9,171 (~$105)

I found that it's often best to use google search to search the kobo store. Books sometimes have multiple editions with significant price differences. Not sure if it would make a difference in this case.

What other popular stores exist? And I assume you sideload those books to Kobo afterwards? In that case, is the experience of reading sideloaded books inferior to that of reading store bought books?