I recently ordered $1000 worth from FCP and whilst I split it into sub-400 dollar lots (including shipping) and ordered over several days some items still arrived in country on the same day, even delivered to me in the same van, and I wasn't pinged.
As it turns out, for that $1000 I ended up paying $120 more for shipping but saved over $500 in duty, taxes and administration fees. The new rules will mean I'll pay $120 less for shipping and about $200 more for duty and taxes, a net $80 extra, on $1000 worth of goods.
The goods, if purchased from BMW NZ would have cost me $2286.
No chance I'm going to start buying locally, it's just a tax grab by the Government, it's not going to help local companies at all.