Apple iMac 21.5'' Core i5 2.7GHz A1418, Late 2012 - DISCOUNT ELECTRONICS
A-Tech 8GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
The Case of the Late-2012 iMacs - MacStories
Apple iMac A1418 21.5" AiO Computer i5-3470S (Late-2012) -
Install memory in an iMac - Apple Support
Apple iMac (Late 2012) review (21.5- and 27-inch) | Macworld
Apple 21.5" Pre-Owned iMac Desktop Intel Core i5 2.7GHz 8GB Memory 1TB HDD ( 2012) Silver MD093LL/A - Best Buy
Apple iMac "Core i5" 2.7 21.5-Inch (Late 2012), 1 TB HD, 8GB RAM, OS 10.11.6 - Imagine41