"But I am hearing that DS is starting to become relatively easy to find in Japan, so now is probably a good time."
You would almost think that being able to meet demand and thus, you know, satisfy customers would be viewed as a good thing by Nintendo. But then if I became a multi-millionaire I would almost immediately quit my job so the concept of "rich getting richer" always seemed kind of pointless to me which I guess is why I'm not running a huge corporation.
Nintendo could probably not ever sell a DS again and still make fistfuls of cash just selling DS games to the existing userbase.