I used AN for my first grow, and I was happy with the results. Their products are, however, very expensive. So I started shopping around on ebay, and found a seller there that sells what they claim are AN's products (ebay seller advancednutrientsusa) at a price which is lower then AN's own website for the exact same products in the exact same quantity. So I call AN's support line to try to figure out if the other company is legit. Now, the folks there couldn't help me very much. All they could tell me is that the ebay seller is not an affiliated company, but they couldn't explain whether or not they were selling AN's products at a cut-rate price. Have any of you had experience with the ebay seller, and can you offer any explanation upon the ponderous question at hand?