Freecycle is an organisation that allows free trading to take place. People post unwanted items and you can have them for free if you'll collect them, you just have to contact the owner of the items! You can also post your unwanted items for someone to collect and reuse!
Freecycle has benefits for the environment. It encourages people to reuse things and buy second hand over brand new. This then has a positive impact on the environment as it reduces waste that is going into landfills and also reduces your carbon footprint!
All you have to do is join Freecycle and then you can browse for groups in your area on Yahoo and then join them as well. I have joined a few groups that are in easy driving distance from where I live.
I am very excited about this and am now looking for camping equipment to my hearts content!