There are so many labs/companies now to choose from. The question I have is can some of these labs produce some of these products at such a low price for them to be dosed accurately? I know some powders are cheaper than others, but I have no idea what it would cost to make any product. Like on primo and arimidex..some are a lot higher than others. For example...some labs may have Arimidex 50/1mg for $130+ and others may have it for $50. Just curious as to why the big difference?