Very painful to have a child addicted to drugs. There is absolutely nothing you can do or say that will change things. This is his journey, unfortunately until he is truly ready for help nothing will change. AS is 21 started using at 16 we did everything we could think of to try to get him to stop. Only until the last year did I finally wake up and realize that he must hit bottom until he comes back to the top. As for dealing very true its easy money for them. I'm sorry you have to go through this hugs and prayers.