Let's see how this goes... most regional forums have a Craigslist/local buys thread to keep an eye out for fixed (or fixed friendly) bikes for sale.
People will either be inclined to share for the better good of the community or hoard the deals for themselves... I'm hoping the former!
For starters here's some good links...
Craigslist (duh!) - http://vancouver.craigslist.org/bik/
You could also post any local eBay deals and comments on previous posts.