What, are you serious? $1 million isn't enough for Ayu stuff.
...
Just kidding.
But in all seriousness (and to be perfectly honest), Ayu would be one of the last people I'd think about with my million dollars. I love her and all, but whatever was left over would to go the miscellaneous categories, Ayu's merchandise being one of them.
But I think the first things I'd buy are the rest of her albums (A Song for XX, Duty, Memorial address, (miss)understood, and GUILTY).