Does anyone know where i can get Benefit make-up for cheap?

i LOVE the range but some of the prices are too much for me :(Does anyone know where i can get Benefit make-up for cheap?
anywhere my sister is a makeup artist and she uses some expensive makeup but she also uses cheap makeup that actually works like from the dollar store seriously. you can get brushes and makeup at any drugstore. they always have some kind of sales on make up, you just have to look closely.