Most people here may not know this, but the Japanese are fanatics when it comes to collecting Apple items. One reason is that many of the Japanese don't spend money like us westerners, and end up saving the money instead. And then, when they do find something they want to purchase, they can really wear people out on the auction sites like eBay. When we laugh at them for spending $6000 on a clear case Mac Portable, the Japanese look at it merely as a win, and cost didn't matter.
Besides Apple stuff, I'm also a Japanophile (google it!) and usually purchase stuff off Japan's auction site of choice - Yahoo! Interesting enough, I sold some stuff on Yahoo! Japan Auctions, and got a much better price than if I sold the same item on eBay. For example, I raised about US$800 selling the whole hardcover set of Apple IIGS books. I also sold a rare Novation Apple Cat II modem for about US$500.
I'll use this discussion to track Yahoo! Japan Auctions I think would be interesting to RetroMac. Enjoy!