Timetec 64GB KIT(2x32GB) Compatible for Apple DDR4 2666MHz for Mid 2020 iMac (20,1 / 20,2) / Mid 2019 iMac (19,1) 27-inch w/Retina 5K Display, Late 2018 Mac Mini (8,1) PC4-21333 / PC4-21300 MAC RAM at Amazon.com
Apple iMac 8.1 20 Inch AIO @ 2.66 GHz Intel Core 2 Duo A1224 2GB RAM / NO OS | eBay
Refurbished 27-inch iMac 3.8GHz 8-core Intel Core i7 with Retina 5K display - Apple
Upgrade your iMac's RAM in less than 5 minutes - YouTube
Apple iMac 3.0Ghz Core 2 Duo 21.5-Inch (Late-2009) *No HDD/RAM* – MSU Surplus Store
Memory Upgrades for Apple iMac 2008 - Up to 6GB
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)