I'm glad your username specifies your location. My biggest pet peeve online these days is someone telling a story about "my country" but never specifying which country that is.
We sell ebooks in every country, including Tunisia - https://www.ebooks.com/en-tn/. I understand that the price of books is sometimes prohibitive, but it's largely outside our control.
The issue is not the amount; it's the currency. Ours is not convertible.
To put it into perspective: even *free* services can be completely inaccessible here if they require payment info for verification purposes.
Acquiring hard currency to spend online is truly a bureaucratic nightmare, and even if you manage it, the annual limit is strictly capped (at around $300).