Well bottom line is the Nismo was only made in limited numbers, so it's not going to be easy to find a set of Nismo rims.
Not every owner is going to even think about changing/selling their rims, and a handful of Nismos have already been crashed.
So the chances of these coming up for sale/trade are slim, unless someone wants to pay Nissan Dealership prices to order an OEM set of Nismo rims.
I'm not making any money here, all I get is a sweet set of black rims (and fitting) that I like, and fits the theme I want to take my car in.
The buyer on the other hand..... gets a limited edition wheel less than market value, and still has their old Z wheels to sell after and make themself some money.
Like I said, it's a Win-Win...
If you don't agree, then don't post