I've bought a few ex govt cars from auctions. Both they and the other govt vehicles all had around 30/40k on the clock. So that seems to be the point at which they get rid of them. I'm sure this will vary from dept to dept though. When I first bought from auction, cars were going cheaply, but I think people have cottoned on and prices have crept up. Probably can still get a bargain, but I was seeing cars getting sold for more than they were going for in the papers. Not sure why. I think some people getting over-excited in a bidding war for a car?