via Digital Book World – After a Roller-Coaster Ride, Ebook Prices Have Stabilized Somewhat in 2013:

Prices have since stabilized at a low level as retailers and publishers jockey for position among consumers who generally like and want lower ebook prices. We are now seeing some of the largest publishers experiment with discounting even newer titles. This past week, the average price of a best-selling ebook dipped below $8.00, driven mostly by $2.99 and $1.99 big-six titles.