So, did your dealer REALLY sell you a full quantity of the
product as promised, or did he "sample the product" and
short you? How are you going to know for sure you're
getting value for your money?
Weigh your purchase, of course! Scalenet has pocket-sized scales for measuring
very small amounts of... stuff. If you need to be able to fit the scale in your
pocket and carry it around just in case you REALLY need to measure the weight
of something really small, here's a source on the web that can help you out.