There are two main schools of thought among Indie writers on ebook pricing. Joe Konrath posted a great article on it on his blog. After reading it, I agreed with everything he wrote -- he made a lot of sense.
Then I read this response by Moses Siregar III on his blog. Very thought-provoking! He makes very good points with some interesting data to back them up.
Technically, The Kinshield Legacy is a backlist title; it had been published in hardcover in 2005 and went out of print. I revived it by self-publishing in ebook formats, which really turned me on to the Indie way of life. Now that I'm getting ready to release my latest book, The Venom of Vipers, I'm thinking long and hard about how to price it. I'm still a new/unknown author without a huge following, but the points Moses makes in his blog are well-worth considering.