I just got an e-mail from Isis saying all their BF'ing supplies are 25% off, including their Medela Pumps. I got my Freestyle from them during a sale and it was a good deal. I believe the prices are good in-store and online.

Here's a link to their online shop to see the prices:
http://shop.isisparenting.com/istar.asp?a=29&search=Stork03162011*+*&pos=0&numperpage=999&sortby=PRICEDESC