Not much. This has been done to death -in summary buying from conceptz is far and away the best option
I was quoted USD$1,795 (to a business address) for the box, and USD$520 shipping by Coz from CZP earlier this week... So yeah... @AUD$2,500 to my mate's business address... And (as a curiosity) @AUD$3,350 from Nissan Australia 2 days ago...