10. The system of claim 9 , wherein the initial ranking score associated with an item listing is to be adjusted when the item listing specifies that an item will ship to a buyer with no shipping fee.
10. The system of claim 9 , wherein the initial ranking score associated with an item listing is to be adjusted when the item listing specifies that an item will ship to a buyer with no shipping fee. 11. The system of claim 10 , including further instructions, which, when processed by the at least one processor, cause the at least one processor to determine that the first item listing specifies that the first item offered in the first item listing will ship to the buyer with no shipping fee, and in response to the determination, to increase the initial ranking score with the adjustment factor to reflect a promotion for the first item listing, the promotion resulting in a higher probability that the first item listing will be presented in the search results page at a position higher than other item listings that do not specify that items will ship to buyers with no shipping fees.