I got some birthday money and I'd like to blow it on a PSP (I think). I'm mostly interested in the ability to do things other than play games - I love to tinker with my electronics. I've got a PS3, so the connectivity there is going to be nice, too. I don't have a problem with new or used and money's not really an object but I love finding a good deal. So, what should I look for a in a PSP? What's the going price these days for a used model? I'm going to Japan in 2 weeks; should I just buy one there? Any other considerations/thoughts? TIA.