I have a close friend that is offering me a BMW 328i 4 door sedan for $6000. The car is in great shape. I have known him for years and hes known to take good care of his car. the private part value on kbb.com is 6750 i believe and the trade in is like at $5800 i think. The car is kept in great condition, leather looks good, paint looks good. its dark green.. is this good for 6000, or am i gettin jipped or wut. share some thoughts.