Goodness me ...
You can miss on some wonderful escorts because you are limiting yourself to this.
Plus, just because someone advertises 50 Euro doesn't mean she will want no extras in the room.
Knowledge is power ...
Anyhow, it's nothing easier to get whatever results you want from queries if you modify the parameters yourself ???
Just run the search for any price criteria you want and right before the age you want, if you look trough the link is obvious where the parameters for fees are.
For example, %2C80, right before the age part at the end of the link stands for up to 80 Euro. Just change that 80 to whatever amount, press enter and you'll get the new results based on your price criteria and voila ...