I'm just wondering.  300-500 seems midrange and 600+ seems upscale here but I could be mistaken.  I'm just talking purely in technical terms of price, not quality or other things involved related to marketing.

of trying to take others rates instead of figuring it out yourself?

Easy!

Phone rings off the hook: too cheap
Phone doesnt ring at all: too expensive

At the end WE do not make our rates, the hobbyist does

Go thru some recent reviews or top 100 if you have VIP, see what's going on and use that as an outline perhaps.  

Start high. It's easy to go lower if you must but you may be a happier escort if you're able to have more personal time. I certainly am, that was my goal when I started all of this, 5 years ago this month!  

In the end, it is so personal. Only you know your monthly expenses and goals.  

Good luck