I have one discount code of 60€ for the enTourage eDGe, and one of 30€ for the OnyxBoox. I tried and it is still working.
The code for Onyx Boox is : Onyx-8993DC
The code for Entourage is : Entourage-758548
I really wanted to spread this tip, just give it a try by adding to the cart and you will see "kortinscode", put the code there