Cheap hairdresser

Hello,
I'm (F24) a broke European international student, and I need to lightly trim my hair. Hairdresser prices here are completely crazy.
Do you know a cheaper hairdresser? Even in New Jersey.
I refuse to pay 100$ for a light trim, when I don't even want them to use their products. I will go in with clean hair, refusing anything, because I have very specific needs about products.