Hi!
I just found from a very helpful thread that there is a posting option called:
3. Printed materials -> This is very special category and lowest among the airmail. This is for magazines and books, or other printed journals. You cannot close this aswell. 75 % cheaper than Airmail.
The question I have is whether anyone has had any experience with this. I would be selling books. Can one register this service? How safe is it? BEst, Michael