Geo-restrictions and e-books

So this is in the name of research for an article I'm writing.

I would like to know – have you ever tried to buy an electronic book and been unable to because of the country you live in? How often does this happen to you? What genre of books does it tend to happen in? Do you have the same issue with self-published books?

Comment below, please. I'll leave this open for a couple of days.