Fwiw, non us businesses have the same problem trying to ship to the us. It’s how governments want to roll now and how they generate counter actions.
I get that it is a shame for you personally. Despite this I think high processing fees are good. First of all, it addresses the issue of people in the EU importing things we really do not need. Secondly, if it is something you really want then it can be imported at a noticible (but managable) premium. If the set of die are special, then paying 3 (or even 10) euro extra would, in my opinion, be fine
This is not a tariff issue, unbelievably, but one about reducing competition.
I’m not sure I’m following the argument here, because tariffs are all about protectionism, which is a form of reducing external competition
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These fees were sucessfully lobbied in the media as a "Temu tax", and even reputable state broadcasters continue to refer to it as a "junk fee". However, it applies indiscriminately to everything from a decades old vintage book purchased from the UK, or spare parts to restore electronics ordered from Japan.