There are many thousands of such court orders issued each year, and items that can't be returned to their legal owner are auctioned off at local auction houses all over the UK. Police auctions are an established route used by regional police forces across the country to dispose of proceeds of crime, lost and found, seized, and unclaimed stolen and confiscated property.
It is important to have realistic expectations when attending a government car auction. While you can find some good bargains, you are not going to find a brand new BMW for $100.00. Government auctions sell both fleet cars and vehicles that have been impounded by government agencies. The conditions of these vehicles can range from great to not running. Set your expectations and budget realistically.