By Brian O’Connell It’s a seller’s market, but car dealers will try to make the best deal possible for them when buying your car. Used car prices have largely followed the rising inflationary rate of other commodities over the past 18 months, with the average price of used vehicle 40% higher than a year ago, according to CoPilot, a vehicle shopping platform that monitors auto prices. While auto industry data indicates that used car prices may be leveling off, car buyers still have a lot of leverage when negotiating the price of their trade-in vehicle. If, that is, they understand how negotiate…