I know many manufactures offers this option and it is usually not much more than just shipping. Oftentimes it is 110 shipping and 160 shipping and "no tax". NOW, I live in Sweden and here we have 25% VAT, I am not the best at math but I know that 50 bucks isn't 25% on something which adds up to 500-600 dollars. Soo what exactly is prepaid, I want to know what exact legislature they are depending on when the offer this. I have asked every seller if the "have a warehouse in Europe", I don't want to ask them right up if the just pick the best country and pay taxes there (not sure this works if you are being strict with the law but let's assume it does).

Incoterms is the only suggestion I have heard.