like checking Eros and ignoring all of them that don't have reviews here, what tools do you use to see if they are at least possibly legit?

I have been mostly using Tineye(http://www.tineye.com), but the other day, I began experimenting with Google images (http://images.google.com) and have seen great results using both.

both require that you can produce the URL of a picture - tineye is a little easier to use, to use google, you need to know to click on the image of a camera in the search field to allow the input of an image URL.

Google is pretty slick, in that it also shows images that are similar - I've found a few where the poster had just cropped some stuff out to try to hide the real photo....

any other free tools out there that we should be using?

Here's an example - I picked one of the pictures from this Backpage ad - http://annapolis.backpage.com/FemaleEscorts/breathtaking-blonde-knockout-21/4473454

and using Google found out that we can get Caitlin Hixx, MMA girl extraordinaire for $200/hr!  NOT!!!!