For comparison sake, I just purchased the following 8GB of memory from Amazon (Crucial) for $34.99: http://amzn.com/B001MX5YWI. The equivalent memory is available via Apple.com for $400.00: http://store.apple.com/us/product/MC016G/A.

Note, I just installed my new memory and it turns out that the new and old modules are branded with Micron/Crucial and produced in China.