I'm looking to buy a used iPod on craigslist. I cant decide if i want the larger 80gb or one of the nanos. I will be using it primarily for skiing but i also have near 120gb(i know it's ridiculous) of music on my computer and it would be convenient not to have to have a good chunk of that on my iPod. I dont have alot of cash to spend so i dont care if the thing is scratched up though i feel that may be an indicator of if it's been dropped and will therefore break? What I'm trying to get at is how do i tell if the thing will be a piece of ____? I know how to put an iPod in diagnostic mode but am not sure which tests to run? Is there one to test the battery? How long will that take? Any other advise you folks could give me would be appreciated.