[David Hodgson]

As Spooky mentioned they have Low Volume Compliance which means you can transfer rego easily from state to state, making them somewhat desirable as this exercise is normally a PITA and sometimes costs someone a sale.
On the down side, they are a series 1 DRB which are really showing their age now. A guy here has one and the paint etc is really suffering (blistering etc), however they have good bones and like any classic production vehicle, can be restored or maintained to respectable level. They run easily obtainable spares; Torana front and rear ends, efi Windsor and I think T5 g/box.