Refurbished: DELL Laptop Latitude E6420 Intel Core i5 2nd Gen 2520M (2.50GHz) 8GB Memory 120 GB SSD Intel HD Graphics 3000 14.0" Windows 10 Pro 64-Bit - Newegg.com
Dell Business Series Latitude E6420 Notebook Laptop PC - Intel Core i7-2760QM, 8GB Ram, 256GB SSD, WebCAM, Windows 10 Professional (Renewed) : Electronics
Dell Latitude E6420, Intel Core i5, 8GB, 120GB SSD, 14” Display, Win 10 Pro Laptop (Refurbished by Microsoft Authorized Refurbisher) - Walmart.com
Inside Dell Latitude E6420 P15G - Disassembly, harddisk/ram/cpu replacement/upgrade Video Guide - YouTube