Available For Sale: Demco Base Plate and Circuitry Harness Design # 9517086. We used it for lugging our 2002 Saturn, which has now been sold. We are asking $250.00, OBO, a new Base Plate is priced at $500.00 plus tax. This in the nick of time for going South and towing your Auto behind your Motorhome. Kindly call 1-.