Avalon Fully-Automatic Electric Stapler for $23.99. Order online for in-store pickup at Staples to lock in the price and save on shipping. Otherwise, shipping is free with free Staples Rewards membership. Here is a screenshot for reference. It staples up to 20 sheets with 26/6 staples, or 15 sheets with 24/6 staples, and has a wall plug and battery backup with 4 AA batteries.