Babysitter rates

So I’m new to the area and trying to check reality here. I have 3 kids, ages 3, 5, and 7. I was just quoted $50/hr for a sitter, which is apparently a “discount” from their typical $30-40/hr/kid

Is this normal here?! I’m used to paying $20/hr for 3 kids and figured it would be more here, but $50/hr (ie, a $100k salary) seems way high.