Turns out that the store owner is a Marine and Vietnam veteran. Before you impulsively try to shoot a man with a Bryco and steal his shit, you may want to find out if the guy had previously made the choice of hunting down and killing people as a means to earn an income, and later wrote a book about it that features a front page picture of him holding a real human skull. That information would come in handy.
Also, it's best to assume that a buisiness man/woman whos wares are valuable and durable goods will probably be armed. Just a thought.