An electronic product transaction method at a merchant aggregator server operated by a merchant aggregator service provider, the method comprising generating and outputting an interface to a user, the interface comprising a plurality of selectable merchant options, each merchant option comprising a link to an interface for a plurality of selectable product options for a respective merchant, each product option comprising information on a product offered for sale, rent or hire by the respective merchant, wherein the interfaces are hosted by the merchant aggregator server; receiving, from the user, a selection of a plurality of merchant options and a plurality of product options for the plurality of merchants using the interfaces for the purchase of the products; and generating and outputting a merchant interface to receive product data from the merchants to generate the product options for the merchant option for each merchant, including receiving code from the merchants to generate interfaces for at least one of the merchant options and the product options on the merchant aggregator server, and modifying the code to any links and functions in the code to operate on the merchant aggregator server.