"I purchased a used radio for a VW Jetta. OEM did not provide a disclosure that VW (maybe others) require a anti-theft code to make the used radio work. For VWs only dealer can provide the code and dealers charge about $150 for the 'service.' This brought the cost of my used radio into the price range fro a new radio. They did not provide even a penny in refund for this non-disclosed cost. Buyer beware."