Amazon.com: Apple iMac MK462LL/A 27-inch Desktop Intel 5K Display 16GB Ram | 1TB Hard Drive (Renewed), Mac OS X : Electronics
Adamanta 32GB (2x16GB) Memory Upgrade for 2020 Apple iMac 27" w/Retina 5K Display, 2019 Apple iMac 27" w/Retina 5K Display, 2018 Apple Mac Mini DDR4 2666Mhz PC4-21300 SODIMM 2Rx8 CL19 1.2v DRAM
2019 Apple iMac 27" 5K 3.6GHz 8Core i9/ 16GB RAM/ 256GB SSD/ Radeon Pro 575X 4GB | eBay