I recommend doing a search of the telephone number before you visit anyone advertising on CL--it'll help you figure out whether or not the poster is really independent or if there's anything fishy.  In the case of this ad, I did a search yesterday and it turned out that the phone number is shared by men offering massages for men.  She may be totally legit and she looks good in the picture, but I've never been to a sensual massage place that has both men and women offering massages to men and women--and I'm not going to start now.