Don't know if I neccesarily agree. In order to sample, you should be buying at least a half an ounce for starters. Second, I know dealers who really don't want to sit around smoking up every paranoid stoner who is scared of getting ripped off. If your dealer is any worthwhile human being he will tell you the truth about how good the weed is anyways. If you are really that concerned just buy a gram bag, if you like it go back and buy a larger quantity of the same stuff.