I am looking for inexpensive dresses that will be suitable for hot weather (that requirement rules out sleeves, high necks and anything fitted through the waist)

What I am a bit sick of is gathered empire lines.

Here is a few of the better (but still rejected) ones that I tried on in my shopping trip a few weeks ago.
http://i297.photobucket.com/al.....ns/031.jpg ( this shows how I really am very flat chested! One of the few sans bra pictures I've shown)
http://i297.photobucket.com/al.....ns/033.jpg

This fit well, but didn't meet the hot weather criteria http://i297.photobucket.com/al.....ns/035.jpg

Any Aussies out there with recommendations. I think about $70 is my upper limit, but a lot less would be great!