“must drive by property before calling for additional information.”

This comment strikes me as odd. I think, why wouldn’t they want to discuss the property with you? What if you are from out of the area?

I searched craig’s list for Atlanta rentals and from that it appears that you are correct, they should be around $600 or better. So maybe the seller actually meant “net”? In that case I would have serious concerns about the building or the area because deals like that don’t linger,if they come up at all. Of course it says don’t call for additional information until you drive by! Some questions you might ask if you did call are, what are the rents ,are there are any “red flags” you should now about the building. Specifically ask about any structural, title or code enforcement issues. Is it for some reason expensive to insure?

If it is a scam deal they wont want to talk with you much or they will say things to make you very worried….like they don’t want an escrow or something like that. If things seem too good to be true they probably are.