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
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Apple iMac (27-inch, unibody, 2009) review: Apple iMac (27-inch, unibody, 2009) - CNET
iMac Intel 27" EMC 2309 and 2374 Teardown - iFixit
Apple iMac Late 2009 All in One Pc i7 16gb Ram 2TB HHD 2.8gz Selling as Is | eBay
Sold - 27" iMac Late 2009 // $295 - Boulder Mac Repair
iMac 21.5" Late 2009 (10,1) - CPU Upgrade E8600 | MacRumors Forums
Shop Imac Late 2009 Ram Upgrade | UP TO 56% OFF
Apple iMac 27-inch Late 2009 - 2.8GHz Core i7 Apple RAM Memory | Kingston