If it can console you, sometimes with other vendors the shipping is more expensive than the products even when staying in the USA. If you haven't already, check if amazon or the publisher (link in my earlier post) is more reasonable priced for shipping to your country -- even if it costs more for the book itself.
Alternatively, see if there is a reasonably priced option to ship an item of that size and weight privately with USPS (the regular post office) or FedEx or UPS or the like. If so, I'll be happy to be the middleman for you: you might buy the book, have it shipped to me in Colorado, and I'll just re-ship it to you. You can get an estimate of the shipping cost to my place with my zip code which is 80301. If it makes sense and you'd like to proceed that way, PM me for my shipping address (and yours where to forward it).