This is an unfortunate part of the internet. There has been a big issue, especially as of late, with false rental listings online. In one instance, the scammer had duplicated my listing at a much reduced price [IE: I had it listed at $1250/month and they listed it, utilities included, at $700 per month]. They requested the interested renters peak into the windows, as they are out of town and unable to show it. This became extremely frustrating for my sellers that were occupying the home and dealing with people peaking into the windows. The scam in this instance was to obtain a cashiers check from the tenants, without them viewing the property nor meeting the landlord. (which believe it or not, some people have been caught in this scam because the property was "too good to be true" and they wanted to make sure they secured it.
It's good that you did your homework and contacted the actual listing agent. An excellent source for rentals would be on MIBOR.com (which is our local MLS) or right here on Trulia.
I wish you the best of luck on your rental search. If you need any additional assistance in locating a rental, please don't hesitate to let me know. I'd be more than happy to assist you.
Century 21 Diversified