There's an offer on my state's sell and swap group for a Medela Dual Electric Breast Pump, used for 4 weeks, with tons of things included that are unopened: "Comes with shields, valves, 3 nursing bras, nursing pads, storage bags new in box. Lanoish cream and more. $100. Was used for 4 weeks."

How hard would it be to sterilize or replace certain parts? Is this worth it? I was just going to register for/buy a manual handheld based on cost..but I'm a novice with pumps so should I jump on this??