1. A method for forming a related searches database for use in conjunction with a search database of an online marketplace system, the method comprising: 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 the potentially duplicate URL, suspending crawling of the potentially duplicate URLs, and storing the body of the URL on the list in the database for subsequent search.