Memory RAM 1x 2GB Apple iMac Early 2009 DDR3 1066MHz SO-DIMM | E-OWC8566DDR3S2GB | APPLE \ MEMORY FOR APPLE \ OWC \ APPLE IMAC \ iMac Early 2009 \ iMac 24'' (Early
2009 Apple iMac 20" Core 2 Duo 2.2GHz 1GB RAM 160GB HDD MC015LL/B (Refurbished) - Walmart.com
Apple iMac A1311 21.5" Desktop - MB950LL/A (October, 2009) for sale online | eBay
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
Install memory in an iMac - Apple Support
8GB -2x4GB Memory Ram Upgrade 21.5" Apple iMac 10.1 3.06GHz Core2Duo Late 2009 | eBay