H.W.
Put it on freecycle and tell the new owner that she needs to buy new lines for it. Your local hospital lactation clinic will likely have all the products she will need for it.
My Medela was a workhorse. I got it on freecycle from a woman who had used it with three babies. My midwives told me what to buy (new lines and bottles) and it was fine. The milk never touches the machine, so why not reuse instead of adding one more product to someone's budget? I was able to pass mine along when I was done with it after a year or so... :)