Amazon.com: Apple iMac 21.5in 2.7GHz Core i5 (ME086LL/A) All In One Desktop, 8GB Memory, 256GB Solid State Drive, MacOS 10.12 Sierra (Renewed) : Electronics
Amazon.com: Apple iMac 21.5 inches Retina 4K i5-8500 8 256GB SSD Radeon Pro 560X Silver MHK33LL (Renewed) : Electronics
Apple iMac (27-inch, September 2013) review: New processors and faster Wi-Fi for Apple's slim desktop - CNET