HP ProBook 450 G4 Intel Core i5-7200U 8GB RAM No SSD / No OS Laptop [B5] - Computerparts.com
HP ProBook 450 G4 Battery Replacement - iFixit Repair Guide
HP ProBook 640 G4 Notebook, 14" HD Display, Intel Core i5-7200U Upto 3.1GHz, 8GB RAM, 512GB NVMe SSD + 1TB HDD, HDMI, Card Reader, Wi-Fi, Bluetooth, Windows 10 Pro - Walmart.com
Hp ProBook 440 G4 i5 7th Gen Kabylake 8GB RAM 128GB SSD 14.1" W/'Finger Print Device, Computers & Tech, Laptops & Notebooks on Carousell
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HP Laptop ProBook 455 G4 (Z1Z78UT#ABA) AMD A10-Series A10-9600P (2.40 GHz) 8 GB Memory 500 GB HDD AMD Radeon R5 Series 15.6" 1366 x 768 Windows 10 Pro 64-Bit - Newegg.com
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Refurbished: HP ProBook 640 G4 14" Laptop, Intel i5 8350U 1.7GHz, 8GB DDR4 RAM, 512GB NVMe M.2 SSD, 1080p Full HD, Webcam, Windows 10 Pro - Newegg.com