And how much customs you pay if you send it to yourself in Austria?
edit: Oh If I understand, customs are 0% in EU?!
Moving things within the EU does not incur additional customs duties. Switzerland is not in the EU but is in the European Free Trade Association.
If you have any doubts you should look on your government's tax website.
When you buy something from another country any import costs are your responsibility and the person you are buying from is unlikely to know all the tax laws for every other country so you should research it yourself.
Its not problem for me to buy it in Austria too.
But according to all this, VATs will be much lower for Switzerland. But I am not sure about CUSTOMS. Taric code they provide looks like it says 0%. I am not sure if they will accept it under that code.