I bought used from Park Avenue Audi before, did they ask you to leave a down payment and you refused or did they say it wasn't necessary? Regardless I would have left a down payment, which I did for mine. I found the negotiations and service to be excellent, no bullshiting and directly to the point. Told them what I wanted (winter mats, tires etc), what I was willing to pay (which was very reasonable) and left the downpayment at the dealership. Done deal. Sorry Munchy but like most people mentioned, your negotiations for a used Audi sounded overly complicated, especially for an A4 that they'll probably sell 14 times over in a week.