the problem I see with it is it doesn't tell you much useful about the auction house..
it'll tell you something selling under value.. then when you check to buy it & resell.. it's actually be undercut that low & all of page 1 is that price.. page 2 is a slightly higher price.. so on & so forth..
If it would look for something undercut when it shouldn't be.. just one thing.. that would be useful..