1. A method using a related searches database in conjunction with a search database of an online marketplace system, the method comprising: forming the related searches database, including using the search database, forming a list of uniform resource locators (URLs) associated with internet web sites to be accessed; removing duplicate URLs from the list; if a URL on the list is similar to another URL on the list, crawling a predetermined number of potentially duplicate URLs; comparing bodies of the URL on the list and the potentially duplicate URLs; if the body of the URL on the list is similar to the body of a potentially duplicate URL, suspending crawling of the potentially duplicate URLs, storing the body of the URL on the list in the related searches database for subsequent search, indexing at least the stored body of the URL to form related search listings in the related searches database; subsequently, receiving at the online marketplace system a search request from a searcher; in the search database, identifying search listings generating a match with the search request; in the related searches database, identifying related search listings relevant to the search request; and returning a search result list to the searcher including the identified search listings and one or more of the identified related search listings.
5. The method of claim 1 further comprising: sorting the identified related search listings by relevancy to the search request; selecting a predetermined number of the identified related search listings as most relevant related search listings; and returning the most relevant related search listings in the search result list.