Too much!
Statute books - £16.99
Core textbooks - £26.99 - £34.99
Studying three modules each semester, with at least 2 recommended core texbooks and the relevant statute books - Sheesh, at least £250 - £300 a semester.
Not to mention the silly nutshells/revision guides you buy!
Don't buy the statute books right away, as some Universities allow photocopies in the exam, and in reality you only refer to a handful of statutes, as everything is based upon cases and how the judges construed those statutes.
Though I would recommend one for "Property Law I".