I had no idea GT5 had so many re-releases :0. I saw the academy edition (whatever that is) in ASDA for £15. I guess that's why it's legs are so good...
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right