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
Used Apple iMac 21.5-inch (Retina 4K) 3.0GHZ 6-Core i5 (2019) MRT42LL/A - GainSaver
Apple iMac A1311 21.5" AiO Computer i5-2400S (Mid-2011) -
Best Buy: Apple 21.5" iMac® Intel Core i5 (2.7GHz) 8GB Memory 1TB Hard Drive Silver ME086LL/A
Apple iMac review (21.5-inch, 2015): 4K is optional, faster hard drives shouldn't be | Engadget