I've been a VW owner for a long time. Looking to move up to other fine German Engineering. I have found a 87 635 CSi at a dealer. Asking Price is $3550. It has 5 spd, AC. Not being familiar yet with Bimmer's, what should I look at under the hood and tranny to make sure it is a good deal and won't need a lot of expensive work. Thanks in advance for any assistance.