I'm not up to date because I don't purchase any but ..................... The commercial dispensaries have products broken down to the point of labeling almost like a chemists analysis with regard to potency. The plants are grown indoors using commercially produced chemical compounds for 'fertilizer' which I consider akin to the GMO and antibiotic / hormone driven factory farm and veg industry.
When the first few dispensaries opened the stuff ran between $18 and $28 / gram translating to roughly $504 to $784 per ounce
I haven't any idea what home grown may sell for but will place a guess at $340 - $400 / ounce depending on the skill of the producer. Citizens are allowed to grow their own up to a certain number of plants and I don't notice any drastic change in peoples behavior since legalization.
Addressing all the gateway theories and the "I know people who are burned out from drugs" posts ..................... People and their brains are all different and in America there are about 335,000,000 brains. I happen to have scored a good one (brain) that has handled everything I threw at it and there seem to be zero detrimental or residual effects. Other people aren't the same and that isn't my problem. Drug addiction is just that, alcohol addiction is the same thing it's just a choice for some which thing to self administer.