Thanks for all the replies/suggestions.

I've been saving up listings from eBay for '83 300D with similar mileage (mine had 198K). I also have all the service records and receipts for any work I did. The car was well-maintained and I worry the insurance co. will just offer me Kelly Blue Book value, which seems to be off for these cars.

I just hate the journey ahead: doing all the legwork, chasing people down, etc. Why can't folks just learn how to drive?! This woman pulled out across 3 lanes of traffic when she couldn't even see what was coming! If I had been on a motorcycle, I'd be dead.