There's plenty of sites that ship worldwide.
My worldphone has a very wide selection of phones, and I remember seeing w900s there. You can check it out, though new might be a little over 500.
I also googled it, and there were many sites selling it. I didn't bother to check if they shipped outside the US, but I'm sure many do.
If you dont' want to pay over 450ish, ebay is your best bet. Just letting you know that it's not really a hard phone to find. | 
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