If you're buying online... you're going to be waiting a LONG time. Imports don't really come down in price much. There are a few exceptions, but they're few and far between.
If you have access to a JP retail store, then that'd be much more promising!
I am fortunate enough that I can order from Amazon.jp, but it's 6,499 yen new, 6,380 used. I think the anime really kept the price up.
I already have the 360 version so I don't really care but I kind of want to stick to using my 360 for 2D games only.