Staples retail stores take 15% off an entire purchase via this printable coupon. That's one of the largest general percent-off discount we've seen from Staples since September, when it offered 25% off one item only. (However, we also saw 25% off in storewide purchases for Staples Rewards members in September.) Some items are ineligible for the discount, including computers, cell phones, Amazon Kindle, Barnes & Noble NOOK, phone cards, and gift cards. Coupon expires November 2.