They shouldn't, because both of your items are exempted from import duty. You will, however, have to pay VAT and processing fees. Sometimes shipments are assessed. Other times there is no assessment. It's random and is probably something to do with if they have enough staff or not.
You can have the items declared as used, however all goods have a value, otherwise you would not have paid for them to be shipped to you.
Sorry, but that probably won't work. If it did everyone would say the same thing and nobody works pay anything to customs.