Restored Apple iMac 21.5-inch 2.9GHZ Quad Core i5 (Late 2013) ME087LL/A 8 GB DDR3 1 TB HDD 1920 x 1080 Display Sierra 10.12 Includes Keyboard and Mouse (Refurbished) - Walmart.com
Apple iMac 21.5" Late 2013 Core i5 2.7GHz 8GB RAM 1TB HDD MacOS Big Sur 11.5.7 | eBay
Install memory in an iMac - Apple Support
How to Upgrade iMac RAM: 2012-2022: EveryMac.com
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
Install memory in an iMac - Apple Support
iMac 2013 Model Ram Upgrade - YouTube
How to upgrade RAM iMac late 2013 21.5inch - break & fix MOVIE - YouTube
Apple iMac 21.5" Core i5-4570R 2.70 GHz, 8GB RAM, 1TB HDD, 10.15.6 Lat – PC Retro Shop
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013