Amazon has a Lenovo ThinkCentre M73z 20" All-in-One Desktop (Refurbished) for $304.99 with free shipping.

• Intel Quad-Core i5-4570S Processor (2.9GHz, up to 3.6GHz with Turbo Boost, 6MB SmartCache)
• 6GB DDR3L SDRAM - 500GB 7200 rpm SATA Hard Disk Drive
• 20" HD+ LED-backlit Display (1600 x 900)
• Intel Core i5-4570S 2.9GHz, 6GB, 500GB HDD, DVD, Webcam, Windows 10 Pro

Dell Refurbished is offering 50% off any Dell Precision Desktop (excluding Clearance items) with free ground shipping when you apply coupon code: PRECISION50DT

• Valid 8/14/2018, 9:00 AM CST to 8/16/2018, 11:59 PM CST