Timetec 32GB KIT(2x16GB) Compatible for Apple DDR4 2666MHz / 2667MHz for Mid 2020 iMac (20,1/20,2) / Mid 2019 iMac (19,1) 27-inch w/Retina 5K, Late 2018 Mac Mini (8,1) PC4-21333 /PC4-21300 MAC RAM at Amazon.com
Apple iMac 21.5-inch (Retina 4K) 3.6GHZ Quad Core i3 (2019) Desktop 8 GB RAM 1 TB HDD-Mac OS (Certified, 1 Yr Warranty) - Walmart.com
2GB DDR2-800 (PC2-6400) RAM Memory Upgrade for The Apple iMac 8,1 (20-inch, 2.4GHz, MB323LL/A) Intel Core 2 Duo (Genuine A-Tech Brand) at Amazon.com
Apple iMac 8,1/E8335/4GB Ram/320GB HDD/HD2600/20"/B - CeX (UK)
NEMIX RAM Compatible for 128GB (4x32GB) DDR4 2666MHz PC4-21300 SODIMM Memory Upgrade for Apple iMac Mid 2020 (iMac 20,1/20,2) / Mid 2019 (iMac19,1) 27-inch w/Retina 5K, Late 2018 Mac Mini 8,1 at Amazon.com
4GB -2x2GB Memory Ram Upgrade 20" Apple iMac-8.1 2.4GHz Core 2 Duo Early 2008 | eBay