There is a type of car auction called the State Car Auctions.  The   procedures are quite similar to the regular auctions, only difference is that the cars/vehicles auctioned here would be the ones got on arrest or seizure.  In short, the vehicles that got arrested for using them  for carrying out some illegal purpose or seized for violating the laws ar auctioned here.

These State auctions are usually held at state offices.  You could get one purchased at an incredible low price.  Those who are experts in this could benefit a lot from this.  One thing more, here the public are not invited for participating in the auction, unless the authorities find that the vehicles do not get sold easily.  The money got from state auctions normally goes to the governments’ account.  It is  a non-profitable show.  The state auctions are not held for lucrative purposes.

The state owned vehicles get auctioned at the government auctions, held in police stations.  The police cars, SUVs for special purposes and other government vehicles are put up for auction here.  Only government employees are allowed to participate in this.

Usually most vehicles available here would be in a good condition.  There are people who had been hired to repair the vehicles that have got complaints.  Since the vehicles belong to the government,  they would have bullet proof glasses, GPS tracking facility, etc.  along with all other  essential/luxury fixtures.
 
By visiting eBAY also you could get  good buys.  These may be available locally also.  One must be sure of what he really intends to buy.
 
Some websites would come up with helping you by providing guidelines to be followed while attempting to buy from auctions. They charge a fees also for this,  and mostly these guidelines would be available  in your nearest library itself.