Searching the forum with MRoogle will usually find answers to most of your questions:
Is AppleCare Worth It? (one of several dozen threads on this exact question)
Pricing is provided when you click "Buy Now" for any model, then scroll to the bottom of the configuration page.
http://www.apple.com/support/products/mac.htmlThanks! Also, do you know how long you have to purchase the apple care after buying the computer?
The AppleCare Protection Plan can be purchased only while your Mac or Apple display is still covered under the standard one-year limited warranty.