Be prepared for a very expensive venture depending on the size of the box. If you go with the post office make sure you get insurance and a tracking number, they are cheapest. That being said they are also the sloooooowest. Iv used UPS a few times but only on extremely nice items. Lets just say a PF box cost me around $70 to $90, depending on the service so discuss it with the buyer. Dont get caught off guard when they quote you $80. The good thing is shipping speed is much faster, more reliable and tracking and insurance are built in. I dont usually ship overseas but did recently and you have to declare what you are shipping and the value, relation to the person, its all very involved. Customs taxes come in to play there for the receiver depending on the value. At UPS, they make you put a card on file in case the receiver refuses to pay customs, then you foot the bill. Thats my experience, hope it helps.