Guys please don't hate on this guy because he's looking to sell so that he can afford some more equipment, yes it is wrong looking to make a buck off patients but to be honest if your selling bud at a fair price to people responsible enough to use it then by all means go for it. I'm not gonna tell you its wrong because the law says so. only skyZUU knows his/her intentions but if it's not going to hurt anyone negatively and help you out a little then it sounds like a good idea.
I'm from california and have done a little bit of research on this topic, as i am interested in the same thing, sorta. From my understanding you can just walk into a dispensary with your bud and ask to speak to a buyer/broker/someone who checks buds and purchases them. From what i'v read many dispensaries are looking for bud to buy but they seem to mark the price down well below what people want to pay. I'd scope out a few dispensaries and get price checks your herb. Most forum posts say that they are looking for a min of 1/4 lb.
hope this helps.