Internet rental scams are all over the web.
Unfortunately, neither trulia, nor any other site, verifiy these listings.
It is up to the consumer to use good judgement, and if something sounds too good to be true, it most likely isn't true.
You're not getting a 3000 sq ft house for $700 a month...........and if you're told you can't see the home in person....and if asked to wire money for keys....run in the opposite direction!!!