Best places to look for used saddles..

I have a couple of options in treeless saddles I want to purchase, but some of them are so very rich for my tastes right now. Where are some good places to look for used saddles?

I am liking the barefoot saddle someone else mentioned… and I am loving this one… http://www.aussiesaddle.com/Products/Saddle/bareback_pad.html

The BAREBACK POLEY SADDLE WITH CANTLE (3rd one down)

Where can I find used one of theses? Or are there any other suggestions that you guys just love?