Simply astounding! This works for the late 2009 iMacs. http://eshop.macsales.com/item/MISC/8566DDR3S8GP/ Buy two and you get 16 GB for $198. Trade in your stock ram (4 GB) for $32. 198 - 32 = $166 There is no tax or shipping fee. A steal for sure. Just spreading the word. Truly, the line between professional and consumer electronics are blurring at an alarming rate. We, the consumers, benefit greatly from this!!!