Depends where you are. Vancouver and Toronto Craigslist activity is very strong in the "For Sale" categories with many thousands of new postings every day. Maritimes, Quebec and some western cities are quite desolate, except for ticket-selling bots it seems.
I agree it really depends on where you are. Craigslist was slow to expand past the major Canadian cities, so in the smaller cities UsedEverywhere or Kijiji were first and remain more popular.
Agreed. I used to live in Victoria, on Vancouver Island, and http://www.usedvictoria.com was probably mentioned just as much as Craigslist. Goes to prove that local services can sometimes make a dent- not a significant one, but I'm sure someone is making a living out of it.