I've been using amazon for lots of stuff...

amazon.co.jp
amazon.co.uk

I event bought a textbook from amazon.co.uk because the book was not sold locally and there is no asia amazon... :| even when I was still in the Philippines using my Phil credit card. quite convenient. Except that the import fees ballooned when the item finally got to me.

There's also ebay...

ebay.co.uk
ebay.com (shipped from US to the UK)

It's really quite reliable. I prefer online shopping than going to the shops.