Real IGF is pretty much non-existent. I am doing my masters in sports nutrition. I asked a couple of my professors who did some research on IGF-1 how much the compound costs. They said for the dosages a human male would require, it would be in the neighbourhood of $10,000USD/week.
Whatever these research peptide chemical companies are selling for a hundred bucks a vial - your guess is as good as mine but it surely isn't IGF-1.