Below is a plain website for a community
which has a section for Barter/Swap & Trade...
Also has free items people want to give away.

This website right now operates in just a
few cities, but one could start a similar
website for their own community. Money is made
by charging employers to register their jobs.
Everything else is Free.

Now a chatteler could easily go and pick up
the free or low price items and sell them to
people who are obviously not familiar with
this board.

Another way to use it for ideas to make money
is to see if their are community trend in
what's wanted or what people are giving away.

Note this website is actually like a "community"
on line. It has forums, places for community
announcements et...

Explore it if you have time as you're sure to
get some ideas from it.

This is the website:

http://www.craigslist.org