Based on my OWN experiences
[QUOTE=new2jax;1128172]Occasionally the knock out picture is the girl, but usually the price is going to be $$ or $$$.[/QUOTE]The post you're talking about with the stock photo. It's been my experience that most ads who use photos like that are either the suitcase pimps who travel around from place to place with their girls, usually running scams or it's big brother. There has been a rare influx of new faces all over central Florida.
Well there's always the possability it's some young girl who looks exactly like the model has decided to break into esorting and has bought the rights to use the stock photos. Heh. I can't imagine any girl going to that expense. She'd just find a similar free one (since the internet is flooded with them) or simply take one of herself which is the easiest and most logical method.