As requested here:

And about this https://www.reddit.com/r/woweconomy/comments/53j1gd/modifying_auctionator_for_faster_scanning_buying/
Yes it breaks searching for stuff you can't use
Yes it is way faster for stuff you can use (most mats, cloth and stuff)
So could we have 2 types of search buttons? or can it auto detect if we can use the item and auto choose the type of search to do?
Having this new search for stuff we can use and the old one for stuff we can't would make me happy and speed up 80% of the searches I do

Add isusable flag to advanced search to speed searches.