If you need high-quality photos to illustrate something, whether it’s a trial presentation or a business slide show, a great place to find just the right photo is iStockphoto. Here is the introduction from the Web site:
iStockphoto® is the world’s preeminent collection of member-generated royalty-free images, at the world’s best prices. There are no subscription fees or extra costs. Just the best Stock Photography, Vector illustrations, and Flash files online, at prices for everyone.