Looking & Possibly buying a 240d tomorrow. Tips?

[derburger]

Still looking for my first MB diesel, I might have found it. I'll be looking at a white 83' 240d manual tomorrow. It has 160,000 miles, has some service records, rebuilt engine (P.O blew it up...?) A/c worked last summer, currently tagged and licensed but it has been sitting for a few months because the owner bought a new VW. I can't drive a manual yet, so i'll have a friend test drive it for me. The owner said there is some slight surface rust, but it is not rusted through. What should I especially look out for on this car? If I do buy it I'll change out all the fluids, filters, do a diesel purge and valve adjustment. I'll offer 2,000 and see what happens. What should I look out for on this car, and what are some things I can do to see if the car is in good mechanical shape (newbie)? Thanks for your help, and hopefully if it's a good car I'll soon have the slowest yet loudest car at school!