They dont say what else needs work, but the body and the interior of the car looks very straight so im assuming it must be something under the car. Once you cancel out the engine due to its rebuild that leaves the only main bits to be fixed as the brakes, suspension (bushings perhaps?), and maybe even chassis if the car was saved from the junkyard no?
You seem to be a lucky man with your car, it looks good in your photo by the way. Very classy example of the e36! And yeh ive learnt from dad that dealers would try to overcharge (along with many new swears haha).This is why im trying to broaden myself in trying to find DIY guides on the internet. sooo many links on this forum its great!
Yeh it makes sense to take the cars previous dwellings into account. Its almost as if you have to be a mechanical detective when buying!