Personally I would wait and see if you are going to need one, and if so, how much expressing you will be doing. There is a big difference between expressing every now and then to keep a stock of EBM in the freezer and needing to express every feed for a premmie. Until you know the situation you don't know which pump will be best. Many mums buy a pump before the baby is born (I did way back then) and then find that they don't need it, or it doesn't meet their needs because their situation is different to planned. Most of the time a pump isn't necessary and getting breastfeeding established before buying one makes things easier. As others have said, there are pumps available in hossy and you can hire or buy one very quickly if one is needed for some reason.