^^Thats right.
If it was Nismo Built or a S-Tune S1, it would look like what Adzmax posted.
It says its got Nismo Turbos, but anyone can get them installed here in AUS.
Seeing the pics on Carsales, it looks to be a Race spec car... Hints from the larger intercooler, radiator, Nismo turbos, Remote oil filter, steering wheel, full adjustable coil overs and all the Nismo upgrades.
When the seller said Nismo built engine, did he mean he rebuilt the engine with Nismo Parts, hence he calling it a Nismo built engine..?
Check VIN numbers and invoices for parts he has spent on.