2017 iMac 21 inch 5K Desktop 3.4GHz Quad i5 16GB RAM/ 1TB SSD in original box | eBay
Apple A Grade Desktop Computer 27-inch iMac A1419 2017 MNE92LL/A 3.4 GHz Core i5 (I5-7500) 16GB RAM 2TB HDD & 2 TB SSD Storage Mac OS Include Keyboard and Mouse - Walmart.com
Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else