I know they pay like 20$ a G but when they buy more they get sweet deals ussually. Besides it's not unheard of for medical users to be smoking well 10G's a day, a good example would be LIP, but I don't think he has a card or even lives in the US. Oh and im from California LA to be specific and yeah almost all dealers go to the club and just buy in bluk, they don't make much profit though.