You should be able to work that out on the buy.com website. You might need to ask them through the Email Help option.
And you should check the European websites (example: http://uk.buy.com/
) too. You might get lower shipping and more favorable currency exchange rate too.
If the laptop weight is 5.48 lbs you can expect the shipping weight to be near 15 lbs is what I would guess.
Buy.com announces worldwide shippinghttp://www.prnewswire.co.uk/cgi/news/release?id=81856