C2C（Consumer-to-consumer），也称“私对私”是一种网络交易的方式，它是指个人对个人的交易形式。较著名的例子有EBay，淘宝等。 其他交易方式有：B2C、B2B

1. ↑ http://coolshell.cn/articles/3820.html
2. ↑ http://en.wikipedia.org/wiki/Copy_to_China

Customer to customer (C2C) markets are innovative ways to allow customers to interact with each other. While traditional markets require business to customer relationships, in which a customer goes to the business in order to purchase a product or service. In customer to customer markets the business facilitates an environment where customers can sell these goods or services to each other. Other types of markets include business to business (B2B) and business to customer (B2C).