First, Looks: I have to like what I see and hope the pictures are up to date and accurate. Variety is what makes this hobby special and not so much her measurements.
Second, Age: I like mature women, but I will make an exception to the rule. 26 is the limit for me.
Third, Activities and services: if she's going to make my fantasies come true then it's has to be on the menu.
Forth, Reviews and website: This is where I can find out if she's credible or not. I can read into the kind of personality she has and if I would like spending time with her.
Last but not least, Rates: Some ladies can get ridiculous here.
I'm good for the average rate for that city. If l think that I would get the ultimate experience and she's really hot, then I would consider giving 50% above the average. After all, you get what you paid for.