Found for sale at the Volo Auto Museum is this 1957 Chevrolet 150 Military Police car. Owned by a Chevy collector and former MP (who drove a car "identical to this one"), it's got a 3-speed automatic and is going for $24,998.
It's fully-restored, stripped, and has a functioning "gumball light" and siren. Fair warning: by "stripped", they do mean stripped: it's got no cigarette lighter, no radio, and no clock. What it DOES have is a driver's armrest. Check out the museum-quality pics after the break.