$400 per week?

I’ve been interviewing AuPairs and the one I liked the most asked for $400 per week non negotiable. She’s part of the extraordinary and the base rate is $300. We offered a car with gas paid in full, new cellphone with unlimited data, and full access to any food/groceries. Even though on paper she seems very solid, I’m not sure if it’s worth this investment. What do you guys think?

Edit: 1) I learned that in California the base per week is $406.09 for 40 hours. And starting in July, it will increase to $513.29 per week. Unless you only need to use 30 hours for the extraordinaire or 25 for the regular program is when you can pay the base cost ($300 extraordinaire or $200 regular).

2) Yes, it is worth it paying more for the right fit. But that you’ll only going to find out when they arrive at your house.