When you're exalted w/ Cenarion Expedition, you can buy the Flask of Distilled Wisdom Recipe from Fedryen Swiftspear in Zangarmarsh.
This costs only a few gold (4) and is NOT BOP!
However, it does require you to be CE Exalted to learn it - but most people don't understand that.
So you can buy a few of these for a few gold and resell them for up to 100g depending on your server.
I've made about 400g so far, only putting one up at a time using an alt so it's not flooded.
GL and enjoy before it gets nerfed! No worries though, the boys over at WoW eXtreme are on top of that. They cost a little money, but it was well worth it.
