This is the cheapest I could find it - Apart from Amazon who do it for £3.97 but charge delivery on top unless you order it with something else to bring the total to £15. So I think this a really good price delivered for a DVD thats only been out a few months, especially considering the extra bit of Quidco discount. Its the normal version btw, not the special edition.
Im sure we all know what its about but Ill post the info from Play anyway:
Based on the epic graphic novel by Frank Miller, 300 is a ferocious retelling of the ancient Battle of Thermopylae in which King Leonidas (Gerard Butler) and 300 Spartans fought to the death against Xerxes and his massive Persian army. Facing insurmountable odds, their valor and sacrifice inspire all of Greece to unite against their Persian enemy, drawing a line in the sand for democracy. The film brings Miller's (Sin City) acclaimed graphic novel to life by combining live action with virtual backgrounds that capture his distinct vision of this ancient historic tale.
Sorry if this has already been posted, I looked but couldnt see it anywhere :)