After 31 years in business, the owners of Broadway Hardware in Bangor plan to close the store’s doors later this summer. Co-owner and general manager Brent Hopkins said the business has been up for sale for four years, but having found no serious buyers, he and his co-owners have instead opted to close up shop so they can retire. “We have decided to retire from the hardware business, and starting June 22 we are having a liquidation sale,” Hopkins said in a video posted to the store’s Facebook page.