If someone just joined today, and they are posting adopts that seem a little fishy to you. Follow these steps. I've had people asked me how I find so many, this is what I do.
Right click the image and copy the url. Go to www.google.com/imghp
click the little camera button you see and paste the url. Google will search by the image looking for anything identical and usually if they are a thief it will be one of he first links.
Just thought I'd post this to help people from buying something stolen.