*Japanese* camera gear tend to be quite a bit cheaper in Japan. While I'd stick to Ebay for European gear, I always go to Yahoo Auctions in Japan form my Mamiya, Pentax, etc. fix.
That's interesting. Living in Japan I NEVER buy camera gear here -- it's much cheaper to buy in the U.S. and have it shipped here. Of course, that depends on what you are looking for. That being said, the (used) cameras here tend to be in much better condition than I've seen anywhere else. If you want new camera gear, then you're probably better off buying from B&H.
My favorite thing is to go where I've never been. D. Arbus