Use the link below that John provided and go to the site. Next, click on the "Claim this listing Â»" link right under the pictures and see if you can claim and then delete the Ad.
Below is the link for the Trulia.com offering that house for rent for $800. This is a fraudulent ad designed to scam gullible renters who pursue a rental house which is clearly being offered for far less than it should be if it was really for rent.
Contact Trulia.com at email@example.com and tell them of the problem and supply the link.