An inventory management system includes at least one hardware processor and an inventory management engine executing on the at least one hardware processor. The inventory management engine is configured to receive, from a mobile computing device of a consumer, product information associated with an article offered for sale in a retail establishment of a merchant, a product tag is attached to the article and includes a tag ID, the tag ID being a unique identifier assigned to the product tag. The inventory management engine also receives the tag ID from the mobile computing device, generates an online listing for the article in an online marketplace, the online listing including the product information, associates the tag ID with the online listing, determines that the merchant is associated with the article, and places the online listing for sale in the online marketplace on behalf of the merchant.