I don't want to derail much more, but I'll add a bit more re: shipping charges...
True, but you wind up paying more for the shipping itself, so it sort of balances out. Sometimes it'll be less, sometimes it'll be more. At least it'll (usually) be faster though. I've had large-ish boxes come up through UPS or FedEx that bypassed brokerage fees, but then my shipping was $40-70 by itself.
Sometimes (rarely, from my experience) the supplier handles brokerage for you, but then also charges you an amount that may or may not be more than if the shipping company did it.
You can choose to broker a parcel yourself by letting the shipping company know that you will do it. You will need your invoice and a few papers to do it. If they bring the parcel to your door, you must refuse shipment and wait a day for it to go back to the depot (but grab all necessary papers from the courier before he leaves). Then head over to the shipping office, show your invoice and id and etc to get your customs papers. Take those papers over to the customs office and have them look it over (you'll still pay relevant duties and taxes, and a small dispensing fee). Now take your approved customs papers back to the shipping office and they'll clear you. Now head over to the depot (which may be different from the office) to claim your package.
Headphones are duty free (so I've been told; don't quote me on it), but as far as I'm aware other stuff may be subject to duties, especially if manufactured overseas. So you'll pay a % on the goods coming in, and oh guess what you'll pay a tax% after the duty% has been calculated, so it's a double kick in the pants.