You can get a lot more than $500 off a single plant. Outdoors grown right into the soil, you could get a pound or more off a single humongous plant, and in California with a medical card you can have 12 of these plants growing at once. Even a small indoor tent grown plant is good for like 5-6 oz or more 3-5 months from start to harvest. Genetics are great these days for seeds and clones. Imagine parting that out for $200 oz or better yet the $30 a gram metric the cops use when they weigh their busts.