Customer to customer (C2C) markets provide an innovative way to allow customers to interact with each other. 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. Other types of markets include business to business (B2B) and business to customer (B2C).
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. The sites are only intermediaries, just there to match consumers. They do not have to check quality of the products being offered.
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 conceptualising 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). While many companies usually operate in one or more of these areas, Customer to Customer businesses operate only within that specific area. Customer to Customer marketing has become more popular recently with the advent of the internet. Companies such as Craigslist, eBay, and other classified and auction based sites have allowed for greater interaction between consumers, facilitating the Customer to Customer model. Furthermore, as it becomes more economical for individuals to network on the internet via social websites and individual content creation, this marketing model has been greatly leveraged by businesses and individuals alike.
There are two implementations of customer to customer markets that are credited with its origin. These are classifieds and auctions.
Newspapers and other similar publications were in frequent circulation and therefore were able to be used to facilitate a common need. Some people wanted things, other people had things and wanted to sell them. This was the birth of classifieds. The use of classifieds is referred to as classified advertisement. Normally used in text based print, classified advertisement is a now a strong vertical market that allows customers to communicate their needs with each other. In 2003 US classifieds market totaled $30.00 billion for both newspapers and online classified ad services.
The oldest auction house is Stockholm Auction House (Stockholms Auktionsverk), which was established in Sweden in 1674. Auctions however, have been recorded as far back as 500 B.C. Deriving from the Latin word aug?re, which means to "'increase' (or 'augment')". Auctions have since widely used a method of liquidating assets, and has evolved into many different variations. The most successful current form of auctions is based on the internet, such as eBay.
Most C2C websites, such as eBay, have both streamlined and globalized traditional person-to-person trading, which was usually conducted through such forms as garage sales, collectibles shows, flea markets and more, with their web interface. This facilitates easy exploration for buyers and enables the sellers to immediately list an item for sale within minutes of registering.
When an item is listed on a C2C site, a nonrefundable insertion fee is charged based on the seller's opening bid on the item. Once the auction is completed, a final value fee is charged. This fee generally ranges from 1.25 percent to 5 percent of the final sale price.
After the C2C site sets up the system in which bids could be placed, items can be put up for sale, transactions can be completed, seller fees are charged, and feedback can be left, while the C2C site stays in the background. For example, at the end of an auction, the C2C site notifies the buyer via e-mail that he or she has won. The C2C site also e-mails the seller to report who won and at what price the auction finished. At that point it's up to the seller and buyer to finish the transaction independently of the C2C site.
C2C sites make money by charging fees to sellers. Although it's free to shop and place bids, sellers place fees to list items for sale, add on promotional features, and successfully complete transactions.
Many C2C sites have expanded and developed existing product categories by introducing category-specific bulletin boards and chat rooms, integrating category-specific content, advertising its service in targeted publications and participating in targeted trade shows. eBay specifically has also broadened the range of products that it offers to facilitate trading on the site, including payment services, shipping services, authentication, appraisal, vehicle inspection and escrow services.
Specialty marketplaces have also been added to serve the specialized needs of buyers and sellers. For example, eBay Motors serves the automotive marketplace, including vehicles, parts and accessories; and Half.com (now closed) was focused on providing a fixed-price trading environment, initially for books music, videos and video games.
Many online auction sites use a system called PayPal for sellers to receive online payments securely and quickly. A traditional credit card is not required to use this site because PayPal can be linked directly to you bank account.
There are various platforms that Consumer-to-consumer e-commerce is taking place on, such as social media (e.g. Facebook), advertisement websites (e.g. Craigslist) and online auction sites (e.g. eBay). 
Consumer to Consumer transactions often involve products sold via either a classified or auction-like system. As such, the products and services bought and sold are usually varied in type and have a short development and sale cycle. Products sold may often be used or second-hand, since consumer to consumer sales are often facilitated through auction or classified sites.
Since products are usually second-hand, surplus, or used there is seldom a long development cycle associated with the products that are marketed via this method. However, in the case of individuals who are looking to sell a product or service they have developed to be sold on the small-scale, there is a product development life cycle. However, even when a product goes through a development life cycle when marketed in this manner, seldom does traditional marketing research occur. Oftentimes individuals are looking to make a quick profit, and simply place their product in the market place in hopes that it will be sold.
Advertising is essential towards the success of any business. In the case of customer to customer marketing, advertising often relates to online auctions and listings. As opposed to the pricey costs to advertise in media such as newspapers and magazines, products are already being promoted and publicized once users decide to officially put them on the internet. Potential buyers will become aware of products or services by conducting searches on the websites. Aside from possible fees and commissions imposed by the auction or listing site, advertising in this market does not require a substantial amount of money.
Customer to Customer marketing has become very popular in the recent years. Customers can directly contact sellers and eliminate the middle man. Moreover, anyone can now sell and advertise a product in the convenience of one's home - enabling one to easily start a business. Therefore, a wide variety of products can often be found on auction sites such as eBay, including second-hand goods. Since majority of these sales occur over the internet, sellers can reach both national and international customers and greatly increase their market. Feedback on the purchased product is often requested to aid both the seller and potential customers. The actual buying and searching process is simplified and search costs, distribution costs, and inventory costs are all reduced. Moreover, the transactions occur at a swift rate with the use of online payment systems such as PayPal.
Although online auctions allow sellers to display their products, there is often a fee associated with such exhibitions. Other times, websites may charge a commission when products are sold. With the growing use of online auctions, the number of internet-related auction frauds have also increased. For instance, a seller may create two accounts on an auction site. When an interested buyer bids for an item, the seller will use another account to bid on the same item and thus, increasing the price. Consequently, many users have purchased products at unnecessarily inflated prices.
Identity theft has become a rising issue. Scam artists often create sites with popular domain names such as "ebay" in order to attract unknowing eBay customers. These sites will ask for personal information including credit card numbers. Numerous cases have been documented in which users find unknown charges on their credit card statements and withdrawals in their bank statements after purchasing something online. Unfortunately, websites often have a liability statement claiming that they are not responsible for any losses or damages. Furthermore, illegal or restricted products and services have been found on auction sites. Anything from illegal drugs, pirated works, prayers, and even sex have appeared on such sites. Although most of these items are blacklisted, some still find their way onto the internet.
Despite the success of eBay, numerous other online auction sites have either shut down or consolidated with other similar sites. Creating an innovative and efficient business model is vital towards success. Online auctions can be categorized into five main models: C2C, B2C, B2B, B2G, and G2P. C2C refers to customer to customer, B2C signifies business to customer, B2B refers to business to business, B2G signifies business to government, and G2P refers to government to public. In recent years, online auctions have even appealed to major businesses. For instance, Sears has reported selling items at higher prices on these auctions when compared to discounting them in stores.
The success of an online auction site largely depends on six variables: interactivity, product offering, level of trust, rate of growth and adoption, networking, level of commitment, and payment options. Interactions among users are crucial and thus, websites must be accessible and easily navigable. E-mails, community boards, and feedback all aid in increasing the interactivity. With the growing need for convenience, the variety of products offered can greatly attribute to the client basis. Especially with the growing number of online frauds, trust is essential in auction sites. Users must be guaranteed that their personal information will remain secured and that they will receive their purchased product in a perfect condition and in a timely manner. With the fast-paced advancements in technology, auction sites must respond to these changes by staying updated. Moreover, sites also need to constantly search for business opportunities in order to expand their market. A large network of users is also crucial. Having an array of different sellers, buyers, suppliers, and delivery agents will increase the number of users, which would also raise the level of interactivity. In addition, forming alliances with different partners will also aid in the site's success. The level of commitment in buyers and sellers also plays a role in the auction's success. Similar to the level of trust, buyers must be ensured that they receive their purchased item, and sellers must actually receive payment. Although most prefer speedy online transactions, it is beneficial to offer different payment options that will accommodate different buyers.
Internet classifieds are another example of customer to customer marketing. An example of an internet classified company, is Craigslist. Craigslist utilizes the internet to attract a wide customer and buyer base which employs the website to list and sell items.
Since the customer to customer marketing strategy is strongly focused on serving the customer, the business model of Craigslist is simple: serve the customer first. Utilizing this model, Craigslist has developed into a prime example of a customer to customer driven 'machine', which focuses on the customer selling to the customer.
Revenues which support the company are derived through subsidiary channels, while maintaining the model and convenience of the site. In fact, Craigslist makes no money off the customer to customer interactions that occur on the classifieds of the website. All of their revenue is derived from portion of the website targeted at businesses. Thus, in other words, their revenue is derived solely from their business to customer model utilized by businesses to post jobs and hire new workers.
As such, it becomes apparent that companies who focus on this particular model and, specifically classifieds, whether online or off, are often not focused on profit; but rather, on delivery of the service or product to ensure customer to customer interaction.
Internet classifieds sites such as OLX, Quikr, Loogga etc. are gaining prominence in emerging economies such as India, Brazil and Nigeria. OLX and Quikr recently enabled their users to sell cows and buffaloes in rural India 
C2C marketing is of critical importance to retailers. When a shopper buys a product, if it can be shared with the shopper's friends, that drives significant traffic back to the customer site. Additionally, shoppers trust user generated recommendations much higher than recommendations pushed by the retailer. Retailers like CafePress have implemented C2C marketing on their website and companies like ShopSocially are building C2C marketing platforms for retailers. Recent trends by Facebook and Wavespot that leverage free WIFI at a local business are indicative of C2C marketing's importance in SMB space.
Most companies think of C2C marketing as the use of social media channels such as Facebook and Twitter. However, in many cases, the messaging tends to be business to consumer.