So, I'm planning on buying myself a PSP. However, I have a couple questions. First of all, which one should I get? There seems to be about a million of them like the original, slim, 3000 and so on. Is there any extreme difference between all of them? And second of all, is there really any way to tell one apart from the other by simply looking at it? I went to a pawn shop near my house and they had three PSPs, all priced for a hundred bucks. I'm assuming they weren't all the exact same model, but if there's a difference in quality between all of them, I don't want to end up buying the worst one for the same price as a better one. I'll probably just end up going to GameStop where people will know what they're doing, but I wanted to figure this out first.