Well it's manufactured in china and sent to Japan, so unless you're living in moon-land you're going to have to pay out the ass for them to ship it overseas.
Fortunately, that's a bit of an embellishment, I wouldn't expect someone to pay more than fifteen, probably ten, USD for them to ship the plush.
The suiseiseki herself, the 50 cm one, was 50 USD when I purchased it, it probably went up.
If you're serious about the investment (if you have a damn job or some cash laying around) go to desuchan.net
and then to /do/.
There's a guide on how to purchase shit from Yahoo auction Japan.
Not to mention that there's a site that sells the dolls directly, but it's a bit of a long story.
just go do /do/, it's the stickied thread.