As the title says, is the lowest GBP price that it's ever been on Amazon UK.
Is region free according to blu-ray.com
http://www.blu-ray.com/movies/Stargate-Atlantis-The-Complete…
Much cheaper than the $189.99 price which Sanity wants for the Stargate Atlantis complete blu-ray set.
http://www.sanity.com.au/products/2202636/Stargate_Atlantis_…
Product Description
Now, for the first time on Blu-ray, you can own all five seasons of this ground-breaking science fiction series in this 20-disc set. Atlantis, built thousands of years ago by the highly evolved ancients, is home base for an elite expedition team from Earth. These courageous military commanders and scientists leap through the City’s stargate to explore the wondrous Pegasus galaxy and battle the treacherous Wraith, who seek control of Atlantis—at any cost.
Includes over 50 hours of special features including extended episodes, behind-the-scenes extras and commentaries with the cast and crew.