In Argentina you can't. I mean, you can order it, but if/when it arrives (a month later) you have to go get it to customs (50km from where I live, in Buenos Aires), where you have to wait standing for 3-4 hours (Monday to Friday between 9 and 11am), present some forms filled with your purchase info, and pay 50% of the amount you had paid for the product (tax), plus the storage fee for each day they had the product in their deposit (I think it's a dollar a day or less).
Also, when you pay by credit card, they (government) also applies a tax of 35% for making a purchase in a foreign currency.
ALL of that only if you find a seller that is willing to ship to Argentina, and if they (people in customs I suposse) don't steal the content of the package (which happens more than one can imagine).