Ocarina of time (J) is available on Nippon Yasan for 4700円. That's the cheapest I've found it anywhere online. I looked on amazon.co.jp, amazon.com, ebay.com, Play-Asia, NCSX, Nin-nin game, and Solaris Japan. ebay.co.jp is under maintenance, so I can't check the price there. Rakuten doesn't have any listings.