You have also got to remember, girls from HC and similar agencies alike are pretty much all charging extras these days for things like CIM and anal, and its not cheap either. It is £50 or £100 extra on top of their already extortionate hourly rates.
At least with agencies like Hamiltons / Bijoux / Allure / Saucy, everything is inclusive in the hourly rate if the lady offers it. None of the ridiculous up-charging can be seen from these agencies.