I only have my email address listed in my ads. I think that (being careful not to read TOO much into wording, because you have no tonality) you can tell a lot about a person by the way the communicate that way.
That said, it is better to talk on the phone. I just inevitably end up shushing the screaming children while the dog barks, and my husband turns on the blender. Or something else equally chaotic!!
But I ask all the above questions as well. At least that way, I know if they are just kicking tires.