My BFF got one, she used it a few times, (like 10 max) but doesn't need
it anymore. It's a completely closed circuit pump, so nothing gets
into the pump itself. you would just have to get new tubes, or boil the
ones she sends you, and it's good to go. It retails for something like
$165, she's looking to sell for $100 OBO.
http://www.ameda.com/ameda-products/ameda-purely-yours-breast-pump