GOFAR is an Australian company and the products are shipped from Australia for each order. When you buy a GOFAR, you are importing the product into your country, which mean that customs duty charges are sometimes imposed (and sometimes not). The basis for the charges is your country's national laws (and sometimes a handling fee to cover the administrative process is also added).  

Unfortunately, there is no way we can influence the import taxes, duties or handling fees as national governments choose to impose these on goods coming into your country.