I tried to do it and, in France at least, you have to package stuff yourself. Which is THE hassle in selling things online. Having to package stuff is precisely why i just throw it away, I mean why bother losing 1h of my time buying a package and sending it for some menial money value.

You're better off selling them for pretty much nothing to a local bookstore with a Used section, i think. Quicker, less hassle, and well it can help the bookstore too...