HP ProBook 6440b 6450b 6550b Drive Bay Filler w/ Hard Drive RAM Wifi Cover Door 760377841346 | eBay
Grade A HP ProBook 6455B 14.0" Widescreen used Standard Laptop - AMD Phenom II N620 Dual-Core 3.00GHz, 8GB RAM, SATA 2.5" 500GB HDD, DVD-RW, Windows 10 Home 64-Bit - Walmart.com
HP PROBOOK 6440B LAPTOP, 4GB, 160GB HDD – refurbcatest
Refurbished: HP Laptop ProBook Intel Core i5 1st Gen 520M (2.40GHz) 4GB Memory 320GB HDD Intel HD Graphics 14.0" Windows 10 Pro 64-Bit 6440B - Newegg.com