This is a good way to make gold starting at around level 15 and higher. If you've ever run through Southern Barrens then you've seen Zhevra's. Around one in every two drop Zhevra Leather, which can be sold in the Auction House for more than 2 gold each (on frostwolf at least). From what I've seen, the higher level ones drop it more often, and the zhervas range from level 8 to around 25. Happy hunting, and thanks for the great site.