In October last year I bought the black C70 from BMG at Mitchum, we organized a unregistered no plates permit $53, we flew down from Sydney landed at 8am, Uber to car at BMG and drove home (no plates) via Brown Bros winery and lunch in Albury, home in the driveway in Wollongong at 8pm.
Blue slip inspection and regoed in NSW the following saturday.
Note: trucking qoute $585 with no winery tour?
12yrs ago I did the same with a 1989 740Turbo that was sold in Wollongong to Melbourne buyer, 4yrs I found it on eBay flew down and drove it back, handed plates in and blue slipped it and regoed.
As has been stated previously it is very important and makes for a quicker registration when all documentation identification details are able to be presented to the RMS in NSW.
Note: its very important to ring your insurer before you drive the car home and get a cover note, just incase.