m 16 turning 17 in a month and i alot of old marks and some scars. I have 145$ in my paypal and i need help deciding what to buy? I currently use an exfoliater and cleanser. But it isnt showing any improvement..had my marks for over a year!

I'm deciding if i should get a dermaroller and some stuff from this http://www.elle.com/beauty/makeup-skin-care/tips/g14/acne-scar-treatment/?slide=1 (10 products)