I worked at a Radio Shack for a couple years in the 90's. I'd be out from behind the counter within a few seconds of people walking through the door. But the guy heading to the component corner, he'd just get a smile and a "let me know if I can help you find anything" from behind the counter. Those guys already knew what they wanted and how to find it. I'm one of those guys now, but the Radio Shacks are gone.