Hi,
Have some docking station to sell on behalf of a school - 12 to be exact :)
They are HP KQ751AA Standard docking stations with 150W smart adaptors. The description lists them as 2008 but they should work for models through to around 2011 (Full list below)
All units are in good to excellent order with no damage and come with unit, power adaptor and power cord
Pickup is Riccarton, Christchurch, Shipping can be arranged at buyers cost
Looking for $50 per unit - proceeds are going back to into the schools ICT budget :)
Compatibility List
HP Compaq 6300, 6510, 6515, 6530b, 6535b, 6710, 6715, 6720t, 6730b, 6735b, 6910, 6930p, 7400, 8200, 8400, 8510, 8710 and 9400 series Notebook PCs and HP Compaq 4200 and 4400 series Tablet PCs
http://h18000.www1.hp.com/products/quickspecs/productbulletin.html#spectype=north_america&type=html&docid=13068
Cheers
Clint
edit: Added link