s others have mentioned, the information that you see on a lady's profile page was entered by her first reviewer. Unless the lady has requested TER administration to change something, the information may stay the same for years.
When deciding whether to see a woman, I wouldn't rely on ANY information you see on her TER profile page. This includes age, physical attributes, services provided and, to your query, cost. Women listed age 26-30, may be over 40. Women listed with natural breasts, may have implants. Women listed as providing BBBJ, may only provide covered BJ's. Women listed as providing multiple pops, may only provide one.
To make the best educated guess possible as to what to expect, read the reviews carefully and look through her website. Both of these will presumably provide the most updated information as possible. Yes, you may be deceived by "old photos" or inaccurate information (i.e. listed age) on a website but frankly it's the best you are going to get. Also, her website is where you should go to find her current rates. I have never had a problem bringing the wrong donation after relying on a ladies rates on her website. Not your fault is she hasn't changed them.
So you should NEVER rely on the cost of service listed on her TER profile page, for deciding what donation to bring. Look at her website (or if she doesn't have one, perhaps her ad page). If there are no rates listed or if they conflict (Website states $300 for the hour; her ad page states $250 for the hour); then you have to ask her the current rates for her time