Lenovo Ideacentre 520 (Core i3 - 6th Gen / 4 GB / 1 TB HDD / 54.61 cm (21.5 Inch) / Wireless Keyboard & Mouse / DOS) F0D5004WIN , All-In-One (Black) vs (Renewed) Lenovo Ideacenter 520 F0D500BUIN 21.5-inch All-in-One Desktop (7th Gen Core-7020U/4GB/1TB/Windows 10 Home/Integrated Graphics), Black