Why Cannabis Vaporization?
Vaporization is a technique for avoiding irritating respiratory toxins in marijuana smoke by heating cannabis to a temperature where the psychoactive ingredients evaporate without causing combustion.
Laboratory studies by California NRML and MAPS have found that vaporizers can efficiently deliver cannabinoids while eliminating or drastically reducing other smoke toxins.
If you are going to get one you must invest for the higher priced ones or you might as well not bother. I have the one they used in the study and its called "the Volcano". IMO, this one performs the best by far and is well worth the money. If you end up being interested, i'm pretty sure ebay is the best place to find them at a reasnoble price.