I Europe (EU) e-book costs more than paper book. Reason for this is that paper books are regarded as a books and they are taxed at lower levels in most countries. E-books on the other had, have been considered as a service, and the tax level has been higher. In Finland a paper books tax is 10% and e-books is 24%. So I pay more for an e-book. The cost is not the only thing to consider, my reasons are like Deskimases (
https://www.mobileread.com/forums/sh...70&postcount=6), in addition my wife said some years a go "you must by no more books as we do not have the room for them". So I bought Bookeen Cybook Odyssey and rest is history. Now I'm on my third reader, Bookeen Cybook Muse HD. I seem to have knack for destroying these once in a while.
Now that there are Finnish e-books widely available from several bookstore (e.g. Adlibris, Elisa Kirja) it is easy to get new books. Elisa seem to be favoring watermarking e-books which I like as Adobe DRM causes endless trouble to Linux users.
I buy my English books usually from Kobo, occasionally from Safari (O'Reilly). Might sift to Elisa Kirja if they have a selection I like and after the EU new directive is in effect so that e-book costs the same or less than paper version.