Place a free ad on Craiglist under the city of San Francisco. To protect your identity, post anonymously. You can always reveal your true name and email address after getting an email response from an interested or inquiring buyer.
Go to a local antiques dealer or a dealer who specializes in Oriental rugs. Such places in San Francisco include Aga John Oriental Rug, where you can get your rug cleaned and/or repaired and then sell it. Since it is used, you may need to consider getting some work done on the rug prior to selling it.
Place an ad in the local newspaper in order to gain some interest. Post it on the online version of the San Fransisco Chronicle, since it is free to post a photo and the actual ad posting is $30. The cost goes up considerable to $72 for a one-day ad in the physical paper. Other ad packages cost even more. A cheaper alternative would be to use an online selling service like The John Khalil Collection. At this site you can upload photos and information about your rugs to potential customers. In business for over 35 years, it sells not only online but has a physical location in Huntington Village, New York.
Place an ad on eBay. Take a picture of the rug and upload the photo to the site along with information about the rug. To be fair to the potential buyers, list any damage or repairs to the rug. Make certain to list the item under a specific heading so that you get traffic from people specifically looking for a Turkish and/or Persian rug.