We refine our estimates from week to week as more data becomes available. The consumer spending estimate is based on the average sales price for the title in the retailers we survey. The market share is converted into a weekly sales estimate based on industry reports on the overall size of the market, including reports published in Media Play News.įor example, if our weekly retail survey estimates that a particular title sold 1% of all units that week, and the industry reports sales of 1,500,000 units in total, we will estimate 15,000 units were sold of that title. Our DVD and Blu-ray sales estimates are based on weekly retail surveys, which we use to build a weekly market share estimate for each title we are tracking. The release date is the date of the original release of the title on video. Sales for The Dark Knight are therefore incomplete. Sales estimates are for sales since July 21, 2009, when our Blu-ray sales tracking started. Harry Potter and the Deathly Hallows, Part II Harry Potter and the Deathly Hallows, Part I Star Wars: The Complete Saga (Episodes I-VI) Harry Potter: The Complete Collection Years 1-7 Lord of the Rings - The Motion Picture Trilogy