While the original idea for Rehash was to design clothing out of recycled clothes, it eventually evolved into a site for trading clothes with other users. Members can trade their unwanted stuff (clothing and accessories) with others who are looking for new items for their wardrobe, and vice-versa. Rehash also acts as a social community where users can get green living advice, read articles, request items, and attend swap events. Membership is free to interested parties.
Put a price tag on it. Successful bartering must result in the satisfaction of both parties. This can only happen if the items bartered are realistically valued. If you have an item you would like to trade, obtain an accurate appraisal. An item is only worth what someone is willing to pay for it. Therefore, do your research and look at the "selling" section on eBay to find out what online buyers have paid for similar items.
Need a ride? Zimride is a ride share service which members use to set up private networks for sharing rides and saving money. Most cars fit four people, yet we usually commute by ourselves. Why not share the burden of car ownership and resource consumption? Centered around hundreds of colleges and universities, you can probably find a ride almost anywhere you need to go near campus.
In his analysis of barter between coastal and inland villages in the Trobriand Islands, Keith Hart highlighted the difference between highly ceremonial gift exchange between community leaders, and the barter that occurs between individual households. The haggling that takes place between strangers is possible because of the larger temporary political order established by the gift exchanges of leaders. From this he concludes that barter is "an atomized interaction predicated upon the presence of society" (i.e. that social order established by gift exchange), and not typical between complete strangers.