The release on the Blu-ray is to be 13 minutes longer than the theatrical version.
DVD of the film would cost ¥ 5,800 and the Blu-ray would cost ¥ 7,140
In accordance with What Would Toto Watch on July 18, 2009, the Blu-ray version of the House of Flying Daggers is sold on Blu-ray but it is sold on the three-set disk together with Curse of the Golden Flower and Crouching Tiger, Hidden Dragon. And that three-set Blu-ray is available on Amazon as Crouching Tiger Hidden Dragon / Curse of the Golden Flower / House of Flying Daggers Trilogy [Blu-ray].
Non-the-less the same site also sells the separate Blu-ray of the House of Flying Daggers and the cost is definitely lower (Flying Daggers Blu-ray).