Used - Apple iMac 24" Early 2008 - Computers Plus Repair - Lexington, KY
A-Tech for Apple 6GB Kit (1x2GB + 1x4GB) DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook (Late 2007, Early 2008, Early 2009), MacBook Pro (Mid 2007, Early 2008), iMac (Mid 2007) - Memory RAM Upgrade at Amazon.com
Install memory in an iMac - Apple Support
Apple 20" iMac Desktop Computer (Early 2008) MB391LL/A B&H Photo