Once upon a time, the M-B 500SEC was considered THE car for high-speed cruising. EVERY F1 driver had one. They were heart-attack expensive in 1985. On Craigslist, there's what looks like a cherry 1985 500SEC for $2999, which is $1 less than I paid for a 1971 914 with dodgey paint and one carb two years ago. A 914 in equal condition to this car would be $8K easy, for a car that's at least 10 years older, a lot less powerful, and with far fewer comfy gadgets.
Clearly, the market prefers Porsche to M-B...