As people have asked for cheap ways of getting stuff home, I decided to create a string with my suggestion. When my daughter started studying in England we sent 2 boxes weighing over 40kg each with GLS. It cost €25 for each box. Since then I have sent Christmas boxes, and other stuff. I can totally recommend them. Oh, unfortunately this is only for Europe.
It is not an ad, just a tip. If anyone has other suggestions, feel free to add.
What I would love is; tips on how to bring stuff back to Germany. We paid about 400 pounds (anyone know where the pound symbol is hidden on a German keyboard?) to bring her stuff back.