After much more searching for a rough price I have found a credible website (motorauthority.com) that has put the 370z Nismo in the "
vicinity of ¥3.5 million (approximately $35,600)"
and I will quote the line for you:
"
We also have images from a Japanese catalog that shows both a Nismo S-Tune ‘Aero’ and ‘Performance’ kit, as well as what appears to be a pricing list at the end. The pricing list also makes reference to an 'S' version, a 'T' version and an 'ST' version, and the final pricing for the cars appears to fall into the vicinity of ¥3.5 million (approximately $35,600) depending on what spec is chosen."
Also here is a little info on the the S-Tune Aero Pack and the S-Tune Performance Package. The S-Tune Aero Pack includes a whole body kit consisting in a front-end lip spoiler, a new nose, side skirts, a rear-spoiler, fender protectors in addition to a set of NISMO-labeled floor mats and it is priced at $4,440 or €3,430. The S-Tune Performance Pack includes a sport exhaust system, LMZ5 19-inch forged aluminum wheels, a sport suspension with new springs and dampers, improved brake calipers and a set of floor mats and is priced at $11,000 or €8,570. I assume the 'ST' version is just both of those packages together.
Photo has also been included
So there you have it Nismo fans, A possible price.
I'll make sure to post pictures and videos of her the second I have her. Good luck to anyone else out there trying to get there hands on one