Yes, as you say Graham, it is a localised NZ option but they have always been known as M325i here & rightly so with the spec they have. Also to your list - sports seats.
They have always (in recent years anyway) had a proportional excess value over a standard 325i & because of the recent E30 tax. these have gone up proportionally, 5k over priced - who knows...
I have seen 2 others in recent times, the $38k Christchurch car that ended up in Te Awamutu, Spectacular car, but not without fault, not sure on purchase price but was north of 30k. Also another original car that was bought for $20 something, again very nice car but not perfect.
The said car on TM now has been on the market for a while now though.