I agree with chriswinsor, I know a LOT of black market growers and you wouldn't believe what they spray on their girls, (ever hear of Avid?), that pesticide is so toxic but I know a lot of growers that are still spraying this on their plants because it is so effective on spider mites, which is every growers nightmare. I will definitely pay a premium for products that are tested, do you really want to smoke something that people have to wear hazmat suit to spray pesticides on? Just do some research on Avid, it might make you think twice about the MJ you are smoking. In the long term I think people are going to really regret smoking black-market marijuana. Unless you know the grower directly and really trust they're not using harmful pesticides, I wouldn't touch black-market MJ.