Currently, Amazon does not have stores in all countries. There are stores in countries like USA, UK, Germany, France, Japan and Canada. People from other countries can actually buy items from any of the above sites.

There is a site that helps you to compare item prices across all amazon sites and gives you the cheapest option including all postage costs.

I have taken an example below:

I’ve chosen Singapore as my home country and I’m trying to buy a book on Elizabethan history. See the screenshot below to see how it compares and shows me best prices.

CheapRiver.com can help you do the comparison between various country sites of Amazon and find the cheapest item price.