Why does dying your hair at a salon cost so much?

Seriously, it’s like around $100 or more! I’m talking about getting “special” highlights like foil weaving, ombre, or bayalage. What exactly makes it so expensive? Is it the product? I mean it takes maybe 1–2 hours to do hair, so why are women paying like $120 for hair? I’ve gone to cheaper salons and done it myself and it doesn’t turn out as nice so I guess I get what I pay for. But still, even doing nails with all the special stuff doesn’t cost that much.