I'm pregnant, and preparing for breastfeeding in the future. I'll have to return to work as a teacher when my baby is three months old, and will probably only have one break (albeit a long one--two hours) in the middle of the day. So I'll probably only be able to pump once, I'm guessing? I know I'll need a hands-free electric pump that hooks onto a bra. On the other hand, we don't have much money, and I can't exactly afford an industrial-strength pump. Which pumps do you ladies use, if you use them? Can anyone in a similar situation recommend a reasonably priced, good pump for me? And is buying a used pump bad?