I would say that you try to find a better dealer before you say anything to the one you have right now. Of course if his prices are that out of control you can always just tell him straight up, no, or say something like "o thats too much money for me right now", something along those lines. But, ya that is a sticky situation, i would tread softly if this is the only guy you can go to for weed, lets be honest, whats worse, having no weed? or paying a little extra?. I would say that being w.o weed would be worse, but thats me, maybe you have a different point of view. But, good luck with that guy.