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
How to Upgrade iMac RAM: 2012-2022: EveryMac.com
Amazon.com: Late-2015 Apple iMac 21.5 with 4K Retina Display/3.1GHz Intel Core i5-5675R Quad-Core (21.5-inch, 8GB RAM, 1TB) (Renewed) : Electronics
iMac | 2.7 GHz Intel i5 | 21.5 Inch | Late 2013 - Techable.com
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Refurbished Late 2013 21.5-Inch iMac Debuts in Apple's Online Store - MacRumors