I think the customs issues regarding shipping used clothes would depend on the amount. A few boxes in the mail, no problem (UNLESS THEY ARE STOLEN EN ROUTE..be sure that signatures are required), a container load of bales of used clothes for resale, no way. I recently returned from the States with three big suitcases and one duffel FULL of used clothes: five sport coats, five coats and jackets, a dozen pair of pants and jeans, six pair of shoes and boots, ten sweaters, three dozen long and short sleeve tee shirts (mostly "unworn" but without tags), over 50 button front shirts, lots of small "stuff" (decent oven mitts and pot holders, chili powder, etc.) and a carry on full of books (no computer). All bags were x-rayed and none were opened. On my customs form I listed several "new" items that I had brought for my bathroom and kitchen (including a shower head and Brita water filter). The total "declared" value was about $50.00. As the agent was looking at the images, I remarked that all new items were listed on the customs declaration and everything else was used. He waved me on without question or comment. I had to pay $350 in excess (checked) baggage fees, but that's far less than any shipping costs would have been considering the weight (three bags at EXACTLY 70lbs and one at EXACTLY 50lbs) and there were no worries about anything getting "lost" in the mail. Be sure to weigh your bags! Just ONE pound over will bump you to the next price level per bag. When I was in the US, United announced massive increases in excess baggage charges, but American hasn't changed...yet. I also find American to offer the cheapest fares AND they offer off peak RT frequent flier reward tickets to most US destinations from Argentina for only 40K miles. In other words: buy three, get one free. I've flown RT to Mexico from BA, RT from Mexico to Paris, and RT from BA to the US, paying a total of just under $3,200 for the three flights. Factor in the FF ticket and it averages out to less than $800 per trip. If anyone knows how to fly cheaper (without being an airline employee or married to one) please let us know.