A friend of mine, (he was actually a used car salesman), once said to me about one of the cars he was selling..."This car's had one careful owner, the other nine didn't give a stuff". I thought that was funny but I certainly don't think what you're going thru is.
I have just bought a 1987 300SEL from a caryard over here in Australia and what you're going thru is what I would consider my greatest nightmare. I too would be feeling sick but you know what, it will sort itself out in your favour. Hey MB4Ever, I truly feel for you and hope it works out for you.
I'll read this thread with much interest and I'm sure I'll read one day in the not too distant future you'll have a win.