HP ProOne 400 G1 AiO Intel Core i5-4590T 2.00 GHz 8GB RAM 500gb hdd No OS | eBay
HP ProOne 400 G1 19.5" Intel Core i5 2.0GHz CPU 8GB RAM 500GB HDD AIO All-In-One | eBay
HP ProOne 400 G2 20in Non-Touch AIO i5-6500 3.20GHz 4GB RAM No AC Adap
Open Box: HP ProOne 400 G1 All-in-One Intel Core i5 4590T (2.0 GHz) 4 GB DDR3 500 GB HDD Windows 7 Professional 64-Bit (available through downgrade rights from Windows 8.1 Pro) - Newegg.com
HP ProOne 400 G1 AiO 19.5" Desktop PC Advanced
HP ProOne 400 G3 20-inch Touch All-in-One PC - Walmart.com
Amazon.com: HP ProOne 400 G2-AIO 20 HD+, Core i5-6500 3.2GHz, 8GB RAM, 240GB Solid State Drive, DVD, Windows 10 Pro 64bit, (RENEWED) : Electronics
HP ProOne 400 G1 21.5 All-In-One i5-4590T 4GB 500GB G5R44UT#ABA [G5R44UT] - $639.00 : Professional Multi Monitor Workstations, Graphics Card Experts
HP 20" ProOne 400 G2 All-In-One Desktop Computer W5Y40UT#ABA B&H