This is obviously still a work in progress as it still has bugs, and find things for the lowest prices is still an issue. I hope these things will be addressed in the near future:
1) Sorting by price does NOT take into account stacks - data samples is flooded with people selling single items who are taking advantage of this. (Yes, these people are wasting sell slots of their own, but they still wastes our time needed to scroll pass them).) There are people who are selling stacks of items (in prices per item) but they are slotted based on the total price of the stack. If I want to sell stacks of 99 at a fair price, it will never make it to the top 400 to be displayed by anyone. Please change this (or add an option) to sort by price per unit.
2) Search is inconsistent - if I search for an item, i.e. phaser compression pistol mk III, under 'all' category, it does not always get the same results as if I had selected it under 'personal weapons.' My guess is that to make things faster, the search engine only search a certain number of entries before calling quits even if it does not finish the job completely.
I'm sure other people have other issues with the Exchange, so I'll leave this for now.