Are either of these any good for £40 or would it be worth paying £90ish for a second hand Nexus 7?
http://www.overclockers.co.uk/showproduct.php?prodid=BG-006-OT&groupid=595&catid=2689
http://www.overclockers.co.uk/showproduct.php?prodid=BG-005-OT&groupid=595&catid=2689
http://www.overclockers.co.uk/showproduct.php?prodid=BG-006-OT&groupid=595&catid=2689
http://www.overclockers.co.uk/showproduct.php?prodid=BG-005-OT&groupid=595&catid=2689