Any tips on buying a used MBP? I would be buying in person through craigslist so I would have the opportunity to inspect the MBP first. How do I go about verifying things like the processor speed, chipset, memory, HD space, graphics card, and whether or not the display is LED? This is a MBP, 2.4 Ghz Core 2 Duo Santa Rosa, 2 GB memory, 160 GB HD, 256 MB NVIDIA GeForce 8600M GT graphics, and glossy LED. I don't have much experience with Macs so I'm not really sure how to check these things. Also, the seller advertises a 3 year AppleCare warranty that is transferable. How do I verify the warranty? Anything else I should look for or ask about? Thanks.