It’s normal in Belgium (and the whole EU I would guess) for packages coming from outside the EU. I was lucky twice (original Emo and replacement) though: Living AI had declared (customs declaration that has to be included with the parcel) the contents of the package as “plastic toy” with a very low value and it passed customs without further inspection so I didn’t have to pay anything extra. I don’t know if they still ship it the same way though.
A couple months ago I received another package from Shenzhen with a correct customs declaration and I had to pay an extra 2/3 of its value (taxes + fees). So yeah, sometimes these packages coming from overseas can get quite expensive.