The sites are only intermediaries, just there to match consumers.
They do not have to check quality of the products being offered.
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 goods or services to each other.
Consumer to consumer (or citizen-to-citizen) electronic commerce involves the electronically facilitated transactions between consumers through some third party.
A common example is the online auction, in which a consumer posts an item for sale and other consumers bid to purchase it; the third party generally charges a flat fee or commission.
In 2003 US classifieds market totaled .00 billion for both newspapers and online classified ad services.
Consumer to consumer (C2C) marketing is the creation of a product or service with the specific promotional strategy being for consumers to share that product or service with others as brand advocates based on the value of the product.
The investment into concepting and developing a top of the line product or service that consumers are actively looking for is equitable to a retail pre-launch product awareness marketing.
There are many different classifications of marketing.
From Government to Business (G2B), Business to Business (B2B), Business to Consumer (B2C), to Customer to Customer (C2C).