Morat, the VAT is charged on everything from 1 cent upwards. The threshold you refer to is the point at where import duty starts t be levied for personal imports, and it is currently set at €150 for any item.
Under €150 you pay VAT on the purchase price [converted to Euros], plus the shipping cost [converted to Euros], and finally the courier admin costs for the customs declaration. VAT is added to the end figure, whether it turns out to be €10 or €149.
It's all money in Revenues coffers, and we have to pay it !!