Finding the perfect photo for your website is very challenging. This article outlines the stock photo sites I use for various projects.
Good stock photo site with reasonable prices. Gotcha: credits are time sensitive and do expire.
Another stock photograph site recommended by Jon Couch. Images Priced as low as $1
$1 - $5 per image, Also have video clips. Jon Couch recommended this one to me. They also have a really aggressive legal team so make sure you keep your proof of purchase.