Smashwords is still having its annual Summer / Winter sale. Which means you can get lots of ebooks  free or Heavily Discounted. My books are between 75 - 100% off as well - https://www.smashwords.com/profile/view/geetumuk

Two of my books are free on Smashwords until the end of the month, and the rest are heavily discounted, between $1 and $2. It's a great deal. With Smashwords, you can download your book in any format, for any device.