Out of this World via Amazon offers Prime members Ghost in the Shell 2.0 on Blu-ray for $8.55 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $4.98.) That's the lowest price we could find by $2, outside of the mention below. It features the new remastered edition of the classic film.

A close price: MediaPlanet via Barnes & Noble charges $5.74 plus $2.98 for shipping.