I checked the AH mid day on sunday for de items and purchased 440g worth of them in 29 items. I got 25 Grater Cosmic Essences at 11g, 71 Infinite dust at 3.9g, and 2 dream shards at 20g. That gave me a DE value of 591.90g.
At the moment that is way over inflated and I expect the prices to drop way down on those mats. I bet infinite dust will settle under 3g each and the essences under 9g by the end of the week.
At the moment I am flipping everything as fast as I can before the price drops too much.