Abstract: A system and method of offering a collection for sale is disclosed. A collection input module may receive a description of a collection and description of items in the collection from a device of a seller. A collection sale module may offer the collection for sale by publishing a description of a sale of the collection as a whole according to a first offering type. An item sale module may offer the items in the collection for sale by publishing descriptions of the respective items in the collection concurrently with the offer for sale of the collection as a whole according to a second offering type. A comparison module may, upon conclusion of an offering period, compare a sum of bids for the respective items to a bid for the collection as a whole and to determine whether the collection is sold as a whole based on the comparison.