Well, a new tool has entered the mix: Wowscan. I have to admit, at first it struck me as a bit too much like The Undermine Journal. Certainly Wowscan works very similar in that it scans auction data and posts it on its site in a searchable format. Now, I'm no Basil or even a Fox, but after some experimentation it seems to me that there are a few advantages and disadvantages to a site like Wowscan in comparison to TUJ.
First of all, and probably the biggest difference that I've noticed, is that Wowscan has the ability to compile all of its realm data into one searchable list. For example, if you wanted to find the absolute cheapest auction of Reins of the Swift Spectral Tiger, all you have to do is select All Realms and search for it. From all of my dealings with TUJ, I have never found the option to search all of the realms at once. Since most of my use of TUJ was focused on a single realm, searching multiple realms at once never really became an issue for me. This function becomes valuable when you are looking to buy an ultra-rare item and don't care how much money you have to spend on realm transfers to get it.