Apple 21.5" iMac® with Retina 4K display (Latest Model) Intel Core i3 (3.6GHz) 8GB Memory 1TB Hard Drive Silver MRT32LL/A - Best Buy
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A-Tech 8GB RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 1.2V 260-Pin SO-DIMM Memory Upgrade Module at Amazon.com
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8GB -2x4GB Memory Ram Upgrade 20" Apple iMac 9.1 2.66GHz Core 2 Duo Early 2009 | eBay
OWC Performance Upgrades for iMac 2010
OWC 8GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Module Upgrade Compatible with iMac, Mac Mini, and MacBook Pro (OWC1600DDR3S8GB) at Amazon.com
iMac, 2021, 24-inch, Apple M1, 256GB SSD, 8GB RAM, Silver
Apple 27" iMac® with Retina 5K display Intel Core i5 (3.3GHz) 8GB Memory 512GB SSD Silver MXWU2LL/A - Best Buy
How to upgrade the RAM on the 27-Inch iMac (2020) | AppleInsider
16GB Memory Upgrade Kit for 2012-2013 iMac 21.5-Inch
Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 for Mac Book,
CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core I3 3.2 27-Inch (Mid-2010) Mc510Ll/A - A29 at Amazon.com