Bad realtor experience, this common?

[Jimmy Rodriguez]

So I stumbled upon a house that i really liked and after a little research (neighbors and online site) discovered it was a pretty good deal. I tried calling the realtor to set up a showing but it was impossible to get a hold of this guy. I called him 7 times over a period of two weeks and left him a message every time. He never called me back. Has anyone delt with a realtor like this?? Anyway, today I go by the house and the sign out front is gone, so is the online listing. I have no idea what happened with this house, does anyone have an idea of how to go about finding out what did? Any help is greatly appreciated!!