The US doesn't charge duties on individual orders of compact discs, LPs, etc. imported into the country. I looked it up on the net once and found that they are specifically excluded, but I can't seem to find anything about it on the net right now. Also, unlike Europe, there's no mechanism in the US for inspection of individual orders coming in from abroad, assignment of duties to those orders, and then collection of those duties by the postal service or private package services (e.g., UPS, FedEx).