Timetec 32GB KIT(4x8GB) Compatible for Apple Late 2015 iMac (27-inch w/Retina 5K Display) DDR3L 1867MHz / 1866MHz PC3L-14900 2Rx8 CL13 1.35V 204 Pin SODIMM Memory Module MAC RAM Upgrade for iMac 17,1
Apple iMac 27" (1TB SSD, Intel Core i5 6th Gen., 3.20 GHz, 8GB) Desktop - Silver - FK472LL/A (2015) for sale online | eBay
Apple iMac 2015 27" 3.3 GHz Quad Core I5 Logic Board for sale online | eBay
Used Apple A Grade Desktop Computer iMac 27-inch (Retina 5K) 3.2GHZ Quad Core i5 (Late 2015) MK462LL/A 8 GB 1 TB HDD 5120 x 2880 Display Sierra 10.12 Includes Keyboard and Mouse - Walmart.com
A-Tech 16GB (2x8GB) RAM for Apple iMac Late 2015 27 inch Retina 5K | DDR3L 1866MHz / 1867MHz PC3L-14900 1.35V 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
What an eyeful: Apple's cut price 27in iMac with Retina Display • The Register