Where are good places to buy RAM (memory) for a Mac?
Solution 1:
Personally I go with OWC. They are more famous for all Mac related upgrades. Here is the memory upgrade link http://eshop.macsales.com/shop/apple/memory/
Main advantage is you can choose RAM based on your model/ make of the year etc...
Solution 2:
Macs and PCs use the same type of RAM just like they use the same type of Hard Drives, if you buy RAM directly from Apple it is definitely marked up. I have personally had good experiences with Kingston. Other popular 3rd party suppliers are New Egg, Tiger Direct, and Crucial.