Welcome to the LivingAI Forums, @nepppke ,
I have moved your new topic to this thread for questions before purchasing.
Below is a link to an owner named @NendosColl also from Greece who has already purchased a Living.AI item, and I presume he did not pay customs tax. You might want to get in touch with him and ask for more information.
And my personal advice is to buy only from the official website store to be safe and to receive full support in case you encounter any issues.
Best regards