Buy Stock Photos

I am a big fan of iStockphoto for affordable stock photos and a great search and browse interface - but Photoshop Tutorials Blog provides a great roundup of free stock photo sources. Check out the comments for more suggestions.

iStockphoto also offers free stock photos on a weekly basis in a number of sizes. To access these just join iStockphoto.

Following from the last post on free stock photo sources, I found this post: Favorite 10 Free Stock Photo Download Sites. Again look at the comments for more suggestions.