The auction house is an agent for the seller of the car. You would expect the auction house to do everything possible to sell your car at the price you want, isnt that what your paying them for?
Im pretty sure that people put thier cars up for auction because they believe they will get a premium price for it, why else would you pay the high fees?
With that being said I can sorta agree with what RS is saying but it still just doesnt "feel" right
