Also I found that some recipes are impossible to complete if you haven't bought lower level ingredients. For example, I tried to make an Apportation skill book, just to find out that the High Tier Air Skillbook doesn't work, only the normal one would, but that one cannot be found after a certain character level.
But manly, crafting is uninteresting to me because the ingredients often cost more than the product. I expect to get a discount for my extra effort and not get hornswoggled.