about to buy a 2005 CVPI with 85000 miles clean has service records from dept showing transport car not cruiser

I have to replace AC condenser he is supplying and I can do it

also he says the brake light comes on when he presses on brake pedal and shuts off when
when released but brakes work just fine... ( any ideas whats wrong?) will it throw a code?

$3500 cash I think is a good deal do you? opinions??

I used to own a 2000 CVPI from California HWY patrol so I have experience fixin maintaining a VIC

 

is it ABS light or the parking brake light that comes on when you apply the brakes