the JP version often goes for more money on US ebay. you can sometimes snag the US version, with a known eye glitch issue, for around $40 (complete, without the box). every VB will eventually suffer from the glitch issue, as the glue for the display ribbon cable will eventually come unstuck. if you feel comfortable doing a repair on it, then get one that is listed as having the issues with the screen (which are most always this glitch), or buy one that says its working perfectly and spend a bit more. you will probably be able to game with a good one for years before it needs repair.
here is more information on the glitch:
http://www.planetvb.com/modules/newbb ... php?topic_id=3314&forum=1http://www.projectvb.com/displayfix.htmlwith that said, the JP version is pretty much the same as the US, unless you get one of the really rare units in the mosaic box, you are just buying the same hardware either way. i do believe that the voltage on the plug is different, so you'll need a JP tap to power the JP unit, unless you game with batteries all the time.
i'm not sure if there are any other significant differences. i'll let the VB collectors comment. =)
the VB is really fun, i hope you end up buying one.