“Go on Craigslist and search for marijuana, and you’ll likely come across quite a few posts advertising for ‘patient-to-patient’ exchanges or delivery of the drug.  The ads will ask for other medical marijuana patients only and, often, they’ll ask for a ‘donation’ fee. . . . calling the money exchanged a donation, doesn’t help either.  ‘That donation, 100 percent of the time that I’ve had interaction with that

[it] has been for the exact street value of what that marijuana actually is,’ . . . [Phoenix Police Lieutenant Darrel Viner] said. ‘So, it’s essentially a sale.’  According to the AMMA, medical marijuana patients can share marijuana with each other, but, ‘Nothing of value can be exchanged for the sharing of medical marijuana’,”

See also “Are Arizona Cannabis Clubs Legal Under Arizona’s Medical Marijuana Laws?