Here's a simple blog which what you need and prices: http://www.e-cigarette-forum.com/forum/blogs/rocketpuppy/6421-simple-buying-guide-starting-diy.html
Btw...Heartland Vapes sells a liter of 6mg for $25.99, but once you dilute it down, for two dollars more, go with the 12mg. Nicotine Solution...