Here are few links to designer resources of image stock, textures, and vector images. I use these 3 sites very often. Best selection I could find. If anyone knows more of resources for free images, please leave me a comment.
FREE Vector Images Link at All-free-downloads
FREE Textures by Texture King
FREE stock+images Images posted by desigers for designers.
To buy images, I finde iStockphoto to be the best overall value.
My designs using free graphics.