Just use google search images that will be quite good. You could also go to photobucket

Again, google image search will give you images which rights are owned by their respective hosts. If you can't generate your own images, why not partner with a photographer or even illustrator.

Some of these suggestions are a bit odd. I would go with purchasing photos from istock... unless you have decent photoshop skills, then you can rip them off and remove the water marks!

But that is bad! =(

You can search pictures from Google Images and I thinks its a cool idea because you can get any type of pics you need for professional use.

So you think that stealing images is professional?