I have had an experience in the past where I had been buying from the same dealer for over two years, but found that over time the bags where getting lighter and lighter, unless your dealer weighs the produced in from of you never expect them to do you a favour, there after the money and in the long run he did himself out of a good customer for I just stopped from buying from him all together.

As regard to door to door delivery the weight should be correct its there choice to deliver and they shift a lot more because they do deliver, so never consider petrol costs. or distance travelled.

Its a business and should be treated like one (unless your buying from a close friend) never be taken short for 1 gram down one day will be 2-3 grams the next day if you let it happen.

G