A lot of the price of the wheels will depend on what the width and offsets of them.
If you're after these wheels, it's probably best to search through Yahoo Auctions Japan and get someone like Streeter or even Import Monster to get them in for you. Don't get too excited about the price you're bidding on though, chances are it's only a third of what you'll end up having to pay (shipping, auction fees, tax (because you'll be looking at items above the $1000 mark), etc).