you can buy & sell stuff, rent an apartment, place personals, promote
your events & lots more at quadspot.com:
http://waterloo.quadspot.com/
http://waterloo.quadspot.com/buy+sell/
there's a site for laurier, too at:
http://laurier.quadspot.com/
http://laurier.quadspot.com/buy+sell/
it's free & there's no registration!