Love the Book Depository, I have ordered heaps of things over the years - they are almost always cheaper than anyone else and who can complain about free international shipping? Amazing!
I've ordered heaps of things from Modcloth and never had any problems! I also read all the reviews before ordering and I've been very happy with most of the things I've received. The customer service is excellent and they have a huge range. I do feel that some of the clothes are too expensive though...
I've ordered a few different things within 6 months (tie & cufflinks, a ladies suit, men's shoes, women's shoes and a huge children's train set) from MyHabit and I haven't had any problems at all. The shipping to Australia is very cheap ($15) and everything arrives quite fast! However, I always order knowing that I probably can't return things given that international returns are too expensive.