Best Buy has a "doorbuster special" on the
Iron Man 2 Blu-ray. For the first two hours of business on Tuesday, September 28 at your local Best Buy store - and until approximately noon Pacific Time online - the
single-disc Blu-ray edition of the movie are just $17.99, while the
BD/DVD/Digital Copy combo pack is $21.99. But the combo is even cheaper at
Newegg: $20.99 with free shipping.
Note that not only does the combo include a DVD and digital copy, but also numerous bonus features which are absent from the single-disc edition.
Thanks to forum members "Foe" and "wormraper."
Update: Amazon has now price matched the
single-disc edition.