I had the Medela Swing
I think it was about £85 and sold on ebay for £65 after I'd used it for a few weeks, so they aren't that cheap even 2nd hand...it was a really good one, nice and strong and easy to use..but whether its worth the extra £££ I don't know..the only thing I had to compare it to (and you cant really compare!) was the hand Avent pump (which I hated!)