The male vice cops look like models in some jurisdictions. In other places they look like dirty old men with pot bellies. The same goes with female vice cops. Also keep in mind that many jurisdictions switch people around in vice and other types of police work. You can never be to careful.  I know in a recent case I heard that a female vice cop looked like some of the providers the guys like to see, fine as can be, the type that would make a guy get a hard on right away.

For screening purposes best to deal that off the boards in in private boards such as the providers only board.

Both site are incredibly reputable & have "newbie" options.