The cost of the treatment completely depends upon the salon you choose, the hair products used and the country you live. Roughly a Malibu hair treatment can cost you anywhere between $ 35 - $ 350 and in case of a DIY treatment it will cost you not more than $ 40-$ 100. Also do not forget you also have to spend on after care products which can cost more $20-$50 depending upon the product and brand.