I drove former CHP mustang 5.0's for many years. I got to know everyone at the auction, so I had insiders on the units. In the old days they would hang whatever price on them, and had much lower miles. Now due to costs they run them to 130,000 or more. The desirable Caprice SS, Impala clone were the last nice rear wheel cruiser, the crown vics were also solid. The majority are bought by cab companies, especially mexican cabs, I shit you not. All in all I bought 5 over the years, 2 crown vics, 1 caprice SS, 2 mustang 5.0
They are soild units, built on a better line with heavy duty police parts. The automakers rarely have defects off this line. Having a cop die in a defective unit is really frowned upon, bad pr. Then, maintenance wise they are kept up ahead of schedule. Always PM'd timely. All top of line factory or better parts. They even chipped some. The camaros replaced the 5.0's. Poor move in my opinion. CHP field guys who I talked to, we all hung out at a restaurant a minute from the freeway, all preferred the Caprice, and then the 5.0. Field commanders got no B/W. My first 2, the 5.0's were B/W. They only spray painted the white doors black. Awesome ride, I loved those. Caused a wreck and messed with many of motorists poppin up behind them when they were flying. Had one carb, one fuelie. So good comparison also. The caprice came from factory black cherry. The camaros white.
Get your bluebooks, what you should be paying, and what the asking price is. Know your shit before you show up because others will. Look for a commander's car with stock factory color. Any factory paint is better than the fall off in 2 year quick shot they give it. Also commander cars are donut delivery wagons. They never hit the speed limit. Guys on the highway, patrolmen? Some of those guys burn tires all shift for laughs. Mileges will vary when they pull them off the line. Depends on their policy. Of course the lower the better. Sometimes they will throw a set of tires on it, battery, other fresh stuff.
Do they have a site?