This is an interesting thread, cos I was wondering the same thing!
This is the price list for the school we have chosen for DD for next year, it is private, I was wondering how it compares? Also, when should I purchase it, do you think at the end of the year?
(sorry for gatecrashing this thread!)

Primary Shorts $23.00
Primary Trackpants $18.00
Primary Summer Dress $55.00
Primary Pinafore $55.00 - $57.00
Primary Jumper $32.00
Polo Shirt (short sleeve) $22.00
Hats $15.00
Secondary Girls Skirt $49.00 - $60.00
Secondary Girls Dress $59.00 - $62.00
Secondary Boys Pants $45.00
Secondary Boys Shorts $39.00
Wool V Neck Jumper $74.50-$92.50
Rugby Jumper $80.00 - $85.00
Long Sleeve White Shirt $20.35
Tie $20.35

Secondary Sports Polo $28.00 - $45.00
Secondary Sports Shorts $28.00 - $35.00
Secondary Trackpants $34.00 - $40.00
Secondary Tracktop $64.00,- $71.00