It is the vendor. I have never seen a vendor in my town. Do they come at random? I have completed every building project and am just waiting for the next event, upgrading my house, trying to make everything beautiful, etc. But it has been almost a week and I wonder if there is something that I am missing...

often play on Sundays? From what I hear, a stroll along the beach can be quite beautiful on Sunday.

I play Monday to Saturday's so now it makes total sense why I never saw them. Maybe I will just hope the work schedule is more random in future updates. If not, it's okay, virtual town is a great game and I appreciate it.