I have picked up my second E23 735i SE, but i have some problems, speedo, cruise control and economy gauge don't work and i have no airflow to the fresh air vents.
The speedo/cruise and economy problems, are they likely to be the batteries on the SI board or the sender and the air vents are they likely to be an air leak or a servo on the HVAC.
Apart from the problems the car runs brilliantly and the body work is remarkably good, with only a couple of rust spots on the sun roof, it is in Alpine White, i will get some better pictures once it has had a wash.