Dell Home and Dell Business & Education take 15% to 20% off select factory-refurbished desktops and notebooks via the coupon codes listed below. They're among the best percent-off discounts we've seen on these units in recent months. Many orders qualify for free shipping and sales tax is added where applicable. Some exclusions may apply. Refurbished items carry a 1-year Dell warranty. Coupons expire July 9 unless otherwise noted. The deals: