AusBonsai

Ever heard of Booko,
It is an amazing resource run from Australia to find the best online price for books. Simply it will list the price and postage costs to Australia seperatly and then combines the two listing the results cheapest first.
I have not bought a book any other way since I found it.

http://booko.com.au/

I used to purchase exclusively from the book depositry uk before discovering booko. With some of the giant book retailers closing there doors I can see booko becoming a more widely used resource as people turn to purchasing online.