Sometimes the info on the review profiles isn't right. Just ask her. Or if you don't feel comfortable doing that, you should go by the rate on her website.

Web sites tend to be the higher of her rates...  compared to her ads.  I would suggest checking her current ads (check the ad dates in links).  Sometimes you can catch a special or sometimes a price drop.  I've seen ladies raise there rates...  then lower them back down lower than the start!   If you find a lower price in a current ad, you can mention the ad site...  but I'd be prepared with enough to cover the balance if she chooses not to honor it.  It's difficult as there is no advance discussion & "negociating" is frowned upon.

Rates on TER are not accurate.  However if her rates on her web site are different from ads, I suggest an email or phone call like this:

In researching you web site and ads, I noticed they do not have the same rates.  I will assume that your web site is correct, unless you tell me other wise.

You have now discussed pricing without giving specifics.  You are not asking for a discount, nor the lowest rate, but pointing out the descrepency.