I have done such treatments and it costed me around 250 euros per session. I am sure I did more than 15 sessions and honestly for me the effects were minimal. However, I am taking also Accutane. Find out more about it on http://accutaneforacne.com/acne-treatments/accutane/. It is way cheaper and it renews and regenerates the skin. Compared to laser treatment Accutane did miracles for me. I think it is best to contact a dermatologist to see what would work best for your skin. Good luck!