What does your Realtor say? Your Realtor should be able to do a real-time check on your MLS.
Or: Why don't you call first? I'm not sure I'd travel 50 miles roundtrip without an appointment, without knowing if it'd been rented. (If you'd called for an appointment, you would have been told it was off the market.) But three times?
Look: Get a Realtor. Or call first.