I am fine with the 'just looking' and I welcome them. Whenever they say that, I say,"Great! Thank you for coming, and by the way, if you know somebody else who might like this house, please have them call me".
I haven't got calls telling me their friends might like the house, but you never know what might or might not happen. Any little chance for my seller works for me. This also builds good will, which helps in the long run.
- never underestimate anything in Real Estate!