Abstract: An administration server configured to define an ecommerce marketplace accessible via the Internet by means of a marketplace GUI. Also included is a seller database configured to maintain a plurality of seller profiles each assigned to a seller, each including a virtual seller shop within the ecommerce marketplace for listing goods and/or services provided by, and available from, a particular seller. Also included is a goods and/or services database configured to maintain a record of goods and/or services provided by a particular seller across the marketplace, and a payment facility configured to accept online payment from a buyer for goods and/or services purchased from a particular seller shop. Each seller profile allows selective listing of goods and/or services provided by another seller as part of goods and/or services available from that particular seller's shop, so that goods and/or services provided by one seller is available from other sellers.