Where to buy used appliance parts

[jcpmont]

I need a water pump for my old Kitchenaid washing machine (it's about 18 years old) but it seems silly to pay 85$ before taxes for a new part (That's the price I got from my local provider - piecesexpert.com). I would like to know if any of you know a place that sells used appliances parts (or new parts but more reasonably priced), either locally (I'm in Montreal) or in the net.
Thanks