I need photos of people's faces.

I noticed 90% of pictures I browsed through were Premium Content? And it was difficult to browse through. How can I filter out premium content so I don't waste hours searching for pictures that I can use? Can pictures be grouped by model?

Is there a less expensive resource? I can't afford 200$ right now, and it looks like most face close ups have strong shadows in them that I would need to digitally remove so I can have some diffuse maps.

What are your thoughts? Is it really good or is it the only resource available?