Does anyone know what the differences are in home microdermabrasion creams? They cost maybe $30 to $80 for a little two or three oz. container, but if you look at what's in them, they are almost the same. I've been doing home microdermabrasion for five years now. I love it but was having trouble with the cost. Recently I found a good buy from; microdermabrasioncreams.com. This brand seems to do exactly the same job. I just can't tell the difference. Am I missing something?