So you want to make gold in WoW? Basil "Euripides" Berntsen is here to help! Auction house PvP is the only true PvP: There are no relevant racials, all classes are equally balanced, and the only differentiators are knowledge and guts. Gold Capped can help with the first one, and if you can make it through a whole article's worth of my typos, bad puns and feral druid jokes every Wednesday, you're guaranteed to have the second one.
There's a new tool in my kit. The Undermine Journal, whose alpha was just recently launched, is a site that lets you see data from your auction house live from the internet. My realm was recently added, and when I searched for Eternal Belt Buckles, it showed me a convenient Google Finance-style graph of the price and availability, as well as the mats needed for it, and a list of my competition!
Words fail me, so hop past the break for a screengrab.