They have been watching too many Westerns. There are those who watch every customer as if they are about to steal something. Not a good feeling to be on the receiving end of this. With this type it is fun to find the large suit case they are selling and start sneaking things in it. Make sure you glance over your shoulder every time you put something in the suit case.
Some sellers are no fun.
In reality, they don't want to sell their possessions. It doesn't matter that their stuff spills by the quarter ton out their apartment's windows, and that they are moving out of state and can only carry three suitcases. The stuff is theirs and not even a pot of gold could separate the stuff from their bosom. However, the real stars of yard sales are the items themselves. Chances are you will find items you never dreamed you needed so badly.