HP ProOne 600 G1 All-In-One PC - Intel Core i5-4690S 3.20GHz, 4GB SO-DIMM DDR3 Memory, 500GB HDD, DVDRW, 21.5 Display, Windows 7/8.1 Pro 64-bit - G5R45UT#ABA at TigerDirect.com
HP ProOne 600 G1 21.5" AiO Computer i3-4160 Windows 10 -
HP ProOne 600 G1 Solid State Drive Replacement - iFixit Repair Guide
Best Buy: HP ProOne 600 G1 21.5" All-In-One Computer 4GB Memory 500GB Hard Drive e1z99ut#aba
HP ProOne 600-G1 21.5" Intel i5 AIO Desktop
Open Box: HP All-in-One PC ProOne 600 G1 (W5Y00UT#ABA) Intel Core i7 4th Gen 4790S (3.20GHz) 8GB DDR3 1TB HDD 21.5" Windows 7 Professional 64-Bit (available through downgrade rights from Windows 10