My friend is selling his macbook because he no longer needs it, for $600.00 according to mac rumors its the one released on 2/2008. And it is the middle model. Model Name: MacBook Model Identifier: MacBook4,1 Processor Name: Intel Core 2 Duo Processor Speed: 2.4 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 3 MB Memory: 2 GB Bus Speed: 800 MHz System Version: Mac OS X 10.5.4 (9E17) Is this a good deal? He says he still has warranty on it. Is there a way I can return this one to the store and get a new one or will they give me a refurb? Thank you.