Here is a data base on legal Nevada prostitutes.
The average rate is about $400 an hour, and the average customer believes he is getting a woman 31 years of age. I won’t summarize the rest, but there is a table of correlation coefficients for many variables.
Here is a concluding excerpt:
I have been informed of many instances of guys walking into a legal
Nevada brothel, picking a lady and going back to her room to negotiate,
and then quoting to her the averages I found in previous surveys. This
is not good negotiating strategy, a topic I usually prefer not to give