The entire ebook library of modern Fairy Tale anthologies edited by Ellen Datlow and Terri Windling is on sale for $1.99 for each title for a limited time. They are usually in the $6 range. Four of the five titles have been on sale previously, but I have never caught Black Thorn, White Rose on sale previously, so I dare say it may be for the first time.
Now in ebook format I am only missing Snow White, Blood Red since it has not been offered digitally yet. I have owned the hardcovers for years, of course.