Save the planet and your wallet when you shop refurbished desktop systems and pre-owned desktop computers at Sage Sustainable Electronics, a Microsoft Authorized Refurbisher. You'll find desktops like HP Z4 G4 Workstations, HP EliteDesk, Dell OptiPlex Mini Tower, and more. Our inventory changes daily, so buy what you see before it's one. All of our desktops come with a one year warranty and a 30 day money back guarantee.