Timetec 16GB KIT(4x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 Dual Rank for iMac (Late 2009 21.5-inch / 27-inch) SODIMM Memory MAC RAM Upgrade for iMac 10,1 and iMac 11,1 at Amazon.com
APPLE iMAC i7 21.5" Late 2013 16 GB RAM 1TB HDD 128 GB SSD 3.1 GHZ NVIDIA GT | eBay
nVIDIA Quadro K2100M 2GB MXM Metal Video Card for iMac 11,1 / 11,2 / 11,3 / 12,1 / 12,2 A1311 A1312 Late 2009 / Mid 2010 / 2011 - AliExpress
Identify your iMac model - Apple Support
nVIDIA Quadro K1100M 2GB MXM Metal Video Card for iMac 11,1 / 11,2 / 11,3 / 12,1 / 12,2 A1311 A1312 Late 2009 / Mid 2010 / 2011 - AliExpress
Apple Imac 11,1 2009 A1312 Mac OS High Sierra 27" intel Core i5 750 2.6 8GB 3TB | eBay
Apple iMac 2009 (Late) 27-inch 2K (iMac 11,1) SSD ,Ram & OSX Upgrades - ZD Laptop Service Centre
Apple iMac 21.5" FHD All-in-One Computer, Intel Core i5-5250U, 8GB RAM, 1TB HD, Mac OX X 10.11 , Silver, MK142LL/A (Used) - Walmart.com