Save the World by recycling on the net

I was reading great article on msn about how to live well on 40,000 dollars a year or less.   Many of the savers use sites that either swap or give items away. Should check out details before joining recycling group. 
Some of these sites are  the following;   freecycle.org,   swap.com, listia.com,  mint.com, and bundle.com.
Check out msn.com   money and finance section for more tips.