I too have recently started nav exercises and will hopefully be taking the exam this weekend. Managed to pick up a second hand CRP5 (not that this one is required for PPL), a protractor and ruler for £40 from my instructor which also included about an hour or two's ground school. You then just need a chart (£15), pens for the chart (£5 from Staples), pencils to mark the wind side of the whizz wheel, something to erase the pen lines (meths, a rubber, etc), a basic calculator, a kneeboard (£2.50 A5 clipboard from Staples), a theory book, and a watch.
Best of luck if it all.
Last edited by StuartUK; 20th August 2013 at 08:53.