I knew a guy that was a driver for escorts back in college. In the late 90s it was over $1,000/night on average iirc. That included more than just sex though that was also attending a gala or sports game or other social events with you.

You can just browse the backpage for a bigger city to get an idea of prices. Apparently basic sex pays below $200h/h in Seattle (chosen at random), so those higher prices would likely be for a night/event/high class.

Per hour or per night?