I have a few friends who have been told that the going rate is no more than 200 dollars a zip here. This is a beautiful medication that takes time, money, and effort to make, not machine made SHIT that destroys your liver. I work at a hydroponics store, and this hobby has become unreal in popularity. Unfortunately, just like everything else, it is an industry. I hate to say it, but most of the people in this industry are money-driven. Where I grow 6 little gals in a tent as a hobby, they have warehouses full of plants to make money. With the rapid popularity jump in growing, I give it 5 years before wal-mart has their own section with ballasts, nutrients, and hoods. They know where the money is.
I know every node on my girls, and truly appreciate the plant. Must be hard to do with 100+ plants in a warehouse.
With a mass of plants it's also easier to sell it cheaper. This probably isn't going to change. Sell to your patients or friends and leave the dispensaries to mass-growers. Only way you'll make anything close to what you want.