I understand that it has a lot do with the fit out cost......putting some striping on a car, and installing a GRN radio & mobile phone car kit in a staff car is not going to be particularly expensive exercise....but putting several radios into a command car, lights & sirens, mobile phone car kit, second battery to run all the extras, and striping, for vehicles that tend to have a lower than average milage is a more expensive exercise.
Add to that the penalties imposed by state fleet for failing to have the vehicle serviced on time...and I believe penalties for failing to submit the speedo reading of each vehicle at regular specified intervals, makes purchasing those vehicles a cheaper option!
And remember, CFS was forced into leasing from state fleet by Govt policy, not by choice...
Pip