TPFEEL 8GB 1866/1867MHz PC3L-14900S RAM DDR3 204Pin SO-DIMM Memory Upgrade Kit For Late 2015 iMac 27" Retina 5K Models and PCs
16GB Memory Upgrade Kit For Apple iMac 2010-2011
8GB (2 x 4GB kit) OEM RAM Memory for Apple iMac Retina 5K 27 inch (Late 2014) Core i5 / i7 PC3-12800 DDR3-1600MHz 204-Pin SoDimm at Amazon.com
NEMIX RAM 16GB Kit (2x8GB Upgrade) DDR3-1600 SODIMM PC3-12800 for Apple MacBook Pro Mid 2012 / iMac Late 2012 / iMac 2013, Late 2014, Mid 2015, Mac Mini Late 2012 at Amazon.com
Apple iMac A1225 24" Core 2 Duo E8135 2.66GHz 6GB DDR3 RAM 640GB HD OS 10.8.5 | eBay
Install memory in an iMac - Apple Support
iMac Memory for Model 13.2 to 15.1| DDR3-1600MHz | 4GB | MacMemory.com
CMS 16GB (4X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core I3 3.06 21.5-Inch (Mid-2010) - A28 at Amazon.com