Just had a bad experience with this mob:
www.spaceandastronomy.com.au
I ordered a book that was indicated as being in stock on their web site at beginning of March. The price was not bad compared to Amazon, so as well as supporting an Aussi business I figured it would be here quicker.
It still has not shown up and they have not answered my last two emails.
Totally unacceptable, I've cancelled my order in writing.