If you've been frustrated with scammers on Craigslist, just wait till you sign up for a paid account with Roomster. Fraudulent listings abound in this space. I have yet to hear from support about how they deal with these scams.
Never send $$ to someone who promises to mail you the keys to a property.
This website has given me nothing but taken precious time in my search for an apartment to rent.
Those who've wasted money on this scam site have an option to get your money back: Contact your credit card company, describe the scam, and they'll likely dispute the charge to your credit card, and credit back your account.
I've included a screenshot of the correspondence between myself and a Roomster representative.
It appears that founder and CEO of Roomster took the opportunity to lie to you in his reply to my post here. I, in fact, did request a refund and was denied, as you can see in the attached photo. Only by contacting my credit card company, was I able to sequester a refund. It is not surprising that Mr. John Shriber's company has 213 complaints with the Better Business Bureau and has just 1 star on Sitejabber.