Popular Valley real estate agents and best-selling authors JoAnn and Joseph Callaway can be found ringing bells next to red Salvation Army kettles on Wednesdays in December. 'Those Callaways' recruit real estate bell-ringers PHOENIX -- Popular Valley real estate agents and best-selling authors JoAnn and Joseph Callaway can be found ringing bells next to red Salvation Army kettles on Wednesdays in December.