1. A method of handling queries at a search platform maintaining a plurality of pre-collected search results associated with a plurality confidence factors, each confidence factor indicating a probability of the associated pre-collected search result being valid, the method comprising: receiving, at the at least one search platform, a query from a client indicating at least one search criterion; and utilizing, with the at least one search platform, the confidence factors associated with the pre-collected search results to increase the mean probability that the pre-collected search results returned to the client in response to the query are valid, wherein the returned pre-collected search results comply with the at least one search criterion.