My thoughts on this subject would be if your selling your meds , figure out a way to grow your own with a lower cost. You can do that try buying in bulk or purchasing your own equipment. A simple rule of business in general would be , buy low sell high. This simply can be applied to the industry. From what Ive heard in this industry building a good relationship from someone who supplies you with medicine is key. Over time they will more than likely supply you at a lower rate which you could pass on to others. I will note this is just an observation , nor what i do . You have to show people respect who risk possible legal trouble to provide you meds. Just like anything in life there are good and bad people , use your judgment to try and determine what is right.