A method of searching for availability of an entity for purchase or reservation. The method comprises the steps of searching for an entity matching a search criterion to obtain a list of entities, wherein the or each entity comprises a parameter having a predetermined availability; automatically searching for one or more available parameters associated with the or each entity at substantially the same time; incrementally generating a list of each entity and one or more available parameters associated therewith to generate a list of entity and available parameters as the automatic search provides one or more results, and displaying the list as it is generated for selection by a user of a predetermined combination of entity and parameter.