I think there's no easy way to get it cheap if you're buying through Amazon Japan or basically the Japan online stores - shipping is expensive. You can try asking your local bookshop to see if they can bring it in, or if you have Kinokuniya around, they should have it.
edit (30 May 2011):
I found that YesAsia US sells this book.
I think there's no easy way to get it cheap if you're buying through Amazon Japan or basically the Japan online stores - shipping is expensive. You can try asking your local bookshop to see if they can bring it in, or if you have Kinokuniya around, they should have it.
edit (30 May 2011):
I found that YesAsia US sells this book.