The guy said his name was Dana Turner, and he was a private investigator. He asked for the owner by name...when I said he was out for the day, he said he would call his cell phone. Wouldn't leave a message.
This is a Debt Collector. When I called the number back, the answering recording said "This is RADC Default Solutions. This call will be recorded. The purpose of this call is to recover a debt..."
They are REDC Default Solutions. They contract with banks - calling their clients who are near foreclosure to try to press them into a short sale. http://redcdefaultsolutions.com