Low-resolution images (the Tumblr embedded image, or a Medium 640 or smaller image on Flickr) are free for internal use & non-public template design. Low-resolution images can be licenses for non-exclusive, non-time-limited public use for a $10 one-time fee, or for exclusive use for a $50 one-time fee.
High & full resolution images (Large & Original sizes on Flickr, or the full 6 MP source JPEG) can be licensed for non-exclusive, non-time-limited use for a $30 (EOS 350D images) or $20 (other camera models) one-time fee. Images at these sizes can also be licensed for exclusive use for a$100 (EOS 350D) or $75 (other camera models) one-time fee.
Images licensed for exclusive use will remain on my Tumblr and/or Flickr feeds, but will have the following text appended to their descriptions:
“This image has been licensed for exclusive use [OPTIONAL: by COMPANY_NAME (COMPANY_URL)] and is unavailable for use or licensing by any other party, for any reason.”