can you give an example for the consumer-to-consumer(c2c) kind of e-commerce

Consumer-to-Consumer Commerce
Businesses deploy chat room technology
Enables consumers to interact directly with each other
Facilitates consumer-to-consumer commerce
C2C— Consumer-to-Consumer commerce; that is,commerce with no middle business people The most notable examples are Web-based auction and classified as sites.Most large venues for such models (for example,eBay and Classifieds2000) are quickly permeated by consumers who participate so actively and regularly that they become small businesses for them.The presence of these quasi-consumers and the obvious businesses that sell through these sites blurs the distinction between b-to-C and pure C-to-C.