I used to use istockphoto.com a lot more, but they went up on their princig, so nearly every image I want ends up costing two credits for the smallest size. Some that I’d really like cost five or more for the SMALL size. That’s too much in my book.So whenever I can, I use stockfresh.com: same principal as istockphoto.com in terms of credits, but for the smallest size (which works fine for thumbnails), everything’s a dollar. The selection isn’t as wide, but it’s rare that I can’t find something at stockfresh.com that won’t work for what I need.