£37.45. Student deal only (or parents/guardians of students) you just have to select your institution from a list.
You don't get a fully boxed version you just get the CD and presumably the CD key. As I remember I originally found the website through a link from the Microsoft website itself so it is legit.
The copy is yours for life too, it doesn't expire at the point you no longer become a student.
p.s. first post so if it's wrong - my bad