A method and a system assign a proprietary currency value to goods to be bartered, the proprietary currency value linked to the current pricing of the goods. For example, an offered listing of goods to be bartered may be received from a first user. A currency converter module may access a database containing online marketplace data relating to the current pricing of goods and may assign a proprietary currency value to the goods of the offered listing to be bartered based on the current pricing of the goods.