My '83 is not registered as a classic, and I carry full coverage with $100 deductible on collision, actual cost of replacement on comprehensive for only $398 a year.
When I asked why it was so cheap, the guy said the car was listed as safest car you can own.
I they must truely just go by the numbers. In years past the people who bought a 240D were very conservative drivers and seldom were in accidents I guess.