They were not there long. At most a couple of nights, since I went by a couple days before discovering the break-in.

Why a seller should say, "here is my agent's card" (or put her cell  # on that sign into your phone). Call her and she will arrange for a private showing."

And then I drum it into their heads that they should never ever ever ever ever let an unescorted stranger they did not invite into their home, for crying out loud!!