I pay around $18-20 for a bottle each of shampoo and conditioner from the salon and it usually lasts me around 6 months. When I was using supermarket products I found them to be more detergent like and I was using more of it so spending about the same as I am now anyway. I either go between Keune or Goldwell and find they work really well on my hair. I don't know what the supermarket products are like these days as I haven't used them in years. I have tried some organic shampoo/conditioner but found my hair didn't really feel clean with them. So now I stick to the salon ones.