Another option (albeit a slow one) is to use the US Postal Service "M-bag". It's an international mail bag that ships by "surface", up to 11 pounds for $11, and then $1 per pound additional up to 64 pounds. Drawback? Six week delivery!
I sold some books to someone in Hong Kong, and they requested this method. Seems slower but cheaper is sometimes worthwhile.
Mike Hall
Davison, Michigan
(but currently in Appleton, Wi.)