But the point is, it's not the US company's responsibility to deduct your country's sales tax for them. Some companies do as a courtesy to their customers, but

But the point is, it's not the US company's responsibility to deduct your country's sales tax for them. Some companies do as a courtesy to their customers, but they're not required to do so. It's your responsibility when importing the item into your country to pay your local sales tax. The US company can treat you like any other local customer.