Maybe that despised manager at Best Buy, who rushed to display of DVDs starring Heath Ledger, understood us better than we did ourselves. Amazon.com's chart of the most popular DVDs for sale, usually dominated by those recently released, contains three new arrivals: 10 Things I Hate About You, A Knight's Tale and Brokeback Mountain — in 6th, 11th and 13th place respectively. All three movies on the online retailer's top 25 list star the Australian actor who died, of an apparent overdose, on Tuesday. (Of course more want to remember Ledger as high-school hero, or lusty knight, than as sad gay cowboy, the 28-year-old star's most critically acclaimed role.) After the jump, the chart.