Apple iMac 3.0Ghz Core 2 Duo 21.5-Inch (Late-2009) *No HDD/RAM* – MSU Surplus Store
iMac (2007-2009) Memory Installation Video - YouTube
Install memory in an iMac - Apple Support
8GB -2x4GB Memory Ram Upgrade 21.5" Apple iMac 10.1 3.06GHz Core2Duo Late 2009 | eBay
Apple iMac Late 2009 All in One Pc i7 16gb Ram 2TB HHD 2.8gz Selling as Is | eBay
Can the Late 2009 27" iMac handle 32GB of RAM? | MacRumors Forums
Early 2009 model iMac Computer, DDR3 8GB (2x4GB) RAM Replacement - YouTube
Apple iMac 3.0Ghz Core 2 Duo 21.5-Inch (Late-2009) *No HDD/RAM* – MSU Surplus Store
Memory Upgrades for Apple iMac 2009 - Up to 32GB
A-Tech for Apple 2GB DDR3 1067MHz / 1066MHz PC3-8500 SODIMM Memory RAM Module for MacBook, MacBook Pro, iMac, Mac Mini - (Late 2008, Early 2009, Mid 2009, Late 2009, Mid 2010) Models at Amazon.com
Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 for Mac Book,
iMac (2009) RAM & Storage Upgrades
Benefits from RAM upgrade to Late 2009 iMac | MacRumors Forums