GreenTextbooks.org is an USA founded online campaign which specializes in the recycling of textbooks, DVDs, CDs.
People could buy used textbooks from GreenTextbooks.org, it definitely could help saving money, as well as cuts down on greenhouse gases caused by the manufacturing of new textbooks.
Buyers could pay by paypal, credit card, which is really convenient.
This is a really great example for our campaign to reference as it is a low budget but effective way to make textbook affordable.
The official stie of GreenTextbooks.org: http://www.greentextbooks.org/?page=shop/index