The old shaped Commodore wagon e.g. VY will fit anything in there.  Gtb Sys 3 machines are a bit tight but will go in as does a Capcom machine.  I know Peter/Gorgar has put a few NIB machines, still in their box, in the back of his Commodore wagon.  The Commodore Sportswagons are no good. 

My VY Wagon is showing signs of it's age but I will hold onto it purely as a machine mover unless I get something like a Territory.

Pajeros are a bit of a PITA as the back seats don't fold down perfectly flat so you need to pack up the back end a bit.