Prices in London are insane people who pay that kind of dough for such an average pro$$ie amaze me 
While you are right about prices I'm curious about your comment highlighted. If that's based on your assessment from a previous punt with her it would have been good you left a review. However if it's based on your assessment of her looks the "average" is very subjective. You may punt based on looks, another would punt on other criteria.
Point is it's a punt to satisfy an urge. In this case it was what I wanted, she was available and I was satisfied. Expensive, relatively so, but that's each punters choice.