This is a very common scam that has been around for several years. Always be careful when looking for rentals online. Do not send money, especially via a service like MoneyGram, which lets people on the receiving end pick up the money at multiple locations. Also do not go to see rentals alone unless you have good reason to really trust the person who will show it to you. Never give out financial or personal information. And Craigslist says, "Refuse background/credit checks until you have met landlord/employer in person." In fact, Craigslist has good advice about avoiding all kinds of scams at the page below.
Cherry Creek Properties, LLC