i bought a pre-owned S320 LWB last august for $44000 and now i go back to the same dealer and they say they can only give me $30000... i haven't even had it for a year! there was 20000 kms on it and now 30000...Is this because the number of new S classes is increasing? i wanna trade it in for a new S430 sport...u peeps having amy trouble with the same problem? plz help, i really need it