7. A system comprising: a processor; and a computer-readable storage device storing instructions, which, when executed by the processor, cause the processor to perform operations comprising: receiving a posting of an image or a video through a social networking site, wherein the social networking site receives and transmits posted images or videos from a posting entity to receiving entities, wherein the posted items comprise at least one of text, images, and videos; identifying data associated with the posting; determining whether the data identifies a product within a product database for sale from the posting entity to yield a determination; and when the determination indicates that there is no reference to the product in the product database: transmitting the posting through the social networking site without an option to buy; and when the determination indicates that the posting references the product in the product database, and thus indicating a sale-related intent: transmitting the posting through the social networking site with a buy option associated with the product, wherein the buy option comprises one of a button, a drop-down menu, or a hyperlink; receiving a purchase interaction associated with the buy option; and processing a purchase of an item based on the purchase interaction, wherein processing the purchase occurs within the social networking site.
7. A system comprising: a processor; and a computer-readable storage device storing instructions, which, when executed by the processor, cause the processor to perform operations comprising: receiving a posting of an image or a video through a social networking site, wherein the social networking site receives and transmits posted images or videos from a posting entity to receiving entities, wherein the posted items comprise at least one of text, images, and videos; identifying data associated with the posting; determining whether the data identifies a product within a product database for sale from the posting entity to yield a determination; and when the determination indicates that there is no reference to the product in the product database: transmitting the posting through the social networking site without an option to buy; and when the determination indicates that the posting references the product in the product database, and thus indicating a sale-related intent: transmitting the posting through the social networking site with a buy option associated with the product, wherein the buy option comprises one of a button, a drop-down menu, or a hyperlink; receiving a purchase interaction associated with the buy option; and processing a purchase of an item based on the purchase interaction, wherein processing the purchase occurs within the social networking site. 8. The system of claim 7 , wherein determining whether the posting is associated with the product in the database of products from the posting entity comprises communicating between the social networking site and the database of products via an application programming interface.