The listing, 2gig memory stick for apple imac has ended.
Kingston - Memory - 4 GB : 2 x 2 GB - SO DIMM 200-pin - DDR2 - 800 MHz / PC2-6400 - unbuffered - non-ECC - for Apple iMac
Item#: YYKM-KTA-MB800K2/4G | Model#: KTA-MB800K2/4G
you can look it up on tigerdirect.com and see it sells for $56.00, now I do not have both memory sticks, which would equal 4 gig memory total, I only have 1 memory stick which equals 2 gigs memory. The picture shows you 2 sticks, which is equal 2 4 gigs of memory, The pic, I provided is 1 stick equaling 2 gigs of memory.