Dell Refurbished Store takes 60% off select refurbished Dell Precision 5810 or 7810 Desktop PCs via coupon code "HOTDEAL60". Plus, the same coupon also bags free shipping. That's the largest flat discount we've seen on these models. Some exclusions apply, including clearance items. Deal ends February 13. Note: Dell refurbished systems are covered by a 100-day Dell warranty.