It really depends on how much you need to pump.......

I got the Medela lactaset manual pump, I really didn't think I would be pumping as often as I am (three times a day!). I got tired of hand pumping very quickly, especially as I was used to using a commercial pump in hospital. So I hired the elcetric component to the Medela from the chemist and it has saved my sanity! It's definitely worth it for $22 a week